Tootfinder

Unveiling Entanglement's Metrological Power: Empirical Modeling of Optimal States in Quantum Metrics
Volkan Erol
https://arxiv.org/abs/2509.15954 https://

Unveiling Entanglement's Metrological Power: Empirical Modeling of Optimal States in Quantum Metrics
Using extensive numerical analysis of 20,000 randomly generated two-qubit states, we provide a quantitative analysis of the connection between entanglement measures and Maximized Quantum Fisher Information (MQFI). Our systematic study shows strong empirical relationships between the metrological capacity of quantum states and three different entanglement measures: concurrence, negativity, and relative entropy of entanglement. We show that optimization over local unitary transformations produces…

Multipartite Markov Gaps and Entanglement Wedge Multiway Cuts
Norihiro Iizuka, Akihiro Miyata, Mitsuhiro Nishida
https://arxiv.org/abs/2507.15262 https://

Multipartite Markov Gaps and Entanglement Wedge Multiway Cuts
The Markov gap, defined as the difference between reflected entropy and mutual information, serves as a diagnostic for quantum recoverability and multipartite entanglement. In holographic settings, it admits a geometric interpretation as the deviation between entanglement wedge cross-sections and RT surfaces. Motivated by this holographic perspective, we propose a generalization of the Markov gap to multipartite systems by using a reflected multi-entropy. The resulting Multipartite Markov gap c…

Influence of dark matter on quantum entanglement and coherence in curved spacetime
Shu-Min Wu, Yu-Xuan Wang, Si-Han Shang, Wentao Liu
https://arxiv.org/abs/2507.16142

Influence of dark matter on quantum entanglement and coherence in curved spacetime
Dark matter (DM) remains undetected, and developing theoretical models such as the promising perfect fluid dark matter (PFDM) is a key challenge in modern cosmology. In this work, we investigate the quantum characteristics of PFDM by analyzing the behavior of quantum entanglement and coherence for both fermionic and bosonic fields near a Schwarzschild black hole embedded in a PFDM halo. Our results reveal that PFDM can either enhance or degrade quantum entanglement and coherence, depending sens…

The exact relation between the entanglement entropies of the $XY$ and quantum Ising chains with free and fixed boundary conditions
Tianhao He, Xintian Wu
https://arxiv.org/abs/2509.16880

The exact relation between the entanglement entropies of the $XY$ and quantum Ising chains with free and fixed boundary conditions
The entanglement entropies of $XY$ chains and quantum Ising chains (QICs) with fixed boundary conditions are studied here. Three kinds of boundary conditions (BCs) are considered: fixed up--up or down--down (the spins at both ends are aligned in the same direction), fixed up--down or down--up (the spins at the two ends are aligned in opposite directions), and fixed--free (the spin at one end is aligned, and the other end is free). It is shown that i) the entanglement entropy of an $XY$ chain wi…

Exact Relation Between Wehrl-R\'enyi Entropy and Many-Body Entanglement
Pengfei Zhang, Chen Xu, Peng Zhang
https://arxiv.org/abs/2509.16036 https://arx…

Exact Relation Between Wehrl-Rényi Entropy and Many-Body Entanglement
Quantum entanglement is key to understanding correlations and emergent phenomena in quantum many-body systems. For $N$ qubits (distinguishable spin-$1/2$ particles) in a pure quantum state, many-body entanglement can be characterized by the purity of the reduced density matrix of a subsystem, defined as the trace of the square of this reduced density matrix. Nevertheless, this approach depends on the choice of subsystem. In this letter, we establish an exact relation between the Wehrl-Rényi en…

Quantum-like representation of neuronal networks' activity: modeling "mental entanglement"
Andrei Khrennikov, Makiko Yamada
https://arxiv.org/abs/2509.16253 https:…

Quantum-like representation of neuronal networks' activity: modeling "mental entanglement"
Quantum-like modeling (QLM) - quantum theory applications outside of physics - are intensively developed with applications in biology, cognition, psychology, and decision-making. For cognition, QLM should be distinguished from quantum reductionist models in the spirit of Hameroff and Penrose and well as Umezawa and Vitiello. QLM is not concerned with just quantum physical processes in the brain but also QL information processing by macroscopic neuronal structures. Although QLM of cognition and …

Quantum Entanglement Index in String Theory
Atish Dabholkar, Eleanor Harris, Upamanyu Moitra
https://arxiv.org/abs/2507.15939 https://

Quantum Entanglement Index in String Theory
We define a notion of `quantum entanglement index' with the aim to compute it for black hole horizons in string theory at one-loop order using the stringy replica method. We consider the horizon of BTZ black holes to construct the relevant conical orbifolds, labeled by an odd integer $N$, and compute the partition function as a function of $N$, corresponding to the fractional indexed Rényi entropy. We show that it is free of tachyons and naturally finite both in the ultraviolet and the infrare…

Impact of Single Rotations and Entanglement Topologies in Quantum Neural Networks
Marco Mordacci, Michele Amoretti
https://arxiv.org/abs/2509.15722 https://

Impact of Single Rotations and Entanglement Topologies in Quantum Neural Networks
In this work, an analysis of the performance of different Variational Quantum Circuits is presented, investigating how it changes with respect to entanglement topology, adopted gates, and Quantum Machine Learning tasks to be performed. The objective of the analysis is to identify the optimal way to construct circuits for Quantum Neural Networks. In the presented experiments, two types of circuits are used: one with alternating layers of rotations and entanglement, and the other, similar to the …

Spiral renormalization group flow and universal entanglement spectrum of the non-Hermitian 5-state Potts model
Vic Vander Linden, Boris De Vos, Kevin Vervoort, Frank Verstraete, Atsushi Ueda
https://arxiv.org/abs/2507.14732

Spiral renormalization group flow and universal entanglement spectrum of the non-Hermitian 5-state Potts model
The quantum $5$-state Potts model is known to possess a perturbative description using complex conformal field theory (CCFT), the analytic continuation of ``theory space" to a complex plane. To study the corresponding complex fixed point on the lattice, the model must be deformed by an additional non-Hermitian term due to its complex coefficient $λ$. Although the variational principle breaks down in this case, we demonstrate that tensor network algorithms are still capable of simulating these …

Historical origins of quantum entanglement in particle physics
Yu Shi
https://arxiv.org/abs/2507.13582 https://arxiv.org/pdf/2507.13582

Historical origins of quantum entanglement in particle physics
In this paper, the historical origins of quantum entanglement in particle physics are systematically and thoroughly investigated. 1957, Bohm and Aharonov noted that the Einstein-Podolsky-Rosen correlation had been experimentally realised in the 1949 experiment of Chien-Shiung Wu and Shaknov. This was the first time in history that spatially separated quantum entanglement was explicitly realised in a controlled experiment. Wheeler first proposed such an experiment as a test of quantum electrodyn…

Gaussian fermionic embezzlement of entanglement
Alessia Kera, Lauritz van Luijk, Alexander Stottmeister, Henrik Wilming
https://arxiv.org/abs/2509.15749 https://

Gaussian fermionic embezzlement of entanglement
Embezzlement of entanglement allows to extract arbitrary entangled states from a suitable embezzling state using only local operations while perturbing the resource state arbitrarily little. A natural family of embezzling states is given by ground states of non-interacting, critical fermions in one spatial dimension. This raises the question of whether the embezzlement operations can be restricted to Gaussian operations whenever one only wishes to extract Gaussian entangled states. We show that…

Christianity, Nationalism, and Ideology in a Globalized World
https://ift.tt/RLB2aOK
Summer 2026 Vietnamese Language Study with Indiana University Kathleen Evans 09/19/2025 - 9:31am …
via Input 4 RELCFP

Towards Temporal Knowledge Graph Alignment in the Wild
Runhao Zhao, Weixin Zeng, Wentao Zhang, Xiang Zhao, Jiuyang Tang, Lei Chen
https://arxiv.org/abs/2507.14475

Towards Temporal Knowledge Graph Alignment in the Wild
Temporal Knowledge Graph Alignment (TKGA) seeks to identify equivalent entities across heterogeneous temporal knowledge graphs (TKGs) for fusion to improve their completeness. Although some approaches have been proposed to tackle this task, most assume unified temporal element standards and simplified temporal structures across different TKGs. They cannot deal with TKGA in the wild (TKGA-Wild), where multi-scale temporal element entanglement and cross-source temporal structural imbalances are c…

Entanglement Entropy of Quantum Corners
Luca Ciambelli, Jerzy Kowalski-Glikman, Ludovic Varrin
https://arxiv.org/abs/2507.16800 https://

Entanglement Entropy of Quantum Corners
In gravitational theories with boundaries, diffeomorphisms can become physical and acquire a non-vanishing Noether charge. Using the covariant phase space formalism, on shell of the gravitational constraints, the latter localizes on codimension-$2$ surfaces, the corners. The corner proposal asserts that these charges, and their algebras, must be important ingredients of any quantum gravity theory. In this manuscript, we continue the study of quantum corner symmetries and algebras by computing t…

Topology and Spectral Entanglement in Cavity-Mediated Photon Scattering
Eric R. Bittner, Andrei Piryatinski
https://arxiv.org/abs/2509.15465 https://arxiv.…

Topology and Spectral Entanglement in Cavity-Mediated Photon Scattering
We develop a diagrammatic theory of cavity-mediated photon-photon interactions in a topological insulator using the SSH model. The fourth-order vertex $Γ^{(4)}(ω_1,ω_2)$ governs spectral entanglement and Kerr nonlinearity, leading to a nonlinear topological phase diagram. We also compute the electronic self-energy from vacuum photon exchange and identify symmetry-imposed limits on band renormalization. These results link band geometry to the emergence of light-matter correlations.

Crosslisted article(s) found for cond-mat.mes-hall. https://arxiv.org/list/cond-mat.mes-hall/new
[1/1]:
- Generation of Volume-Law Entanglement by Local-Measurement-Only Quantum Dynamics
Surajit Bera, Igor V. Gornyi, Sumilan Banerjee, Yuval Gefen

Complex Heat Capacity as a Witness of Spatio-Temporal Entanglement
Mia Stamatova, Vlatko Vedral
https://arxiv.org/abs/2508.15728 https://arxiv.org/pdf/2508…

Complex Heat Capacity as a Witness of Spatio-Temporal Entanglement
We propose a novel witness of temporal quantum entanglement using the imaginary component of the complex heat capacity - a measurable thermodynamic quantity in temperature-modulated calorimetry. By establishing a direct correspondence between complex heat capacity and the pseudo-density matrix formalism, our approach enables the characterisation of both spatial and temporal quantum correlations without demanding additional state-level manipulation beyond initial tomography. We analytically demo…

Replaced article(s) found for physics.atom-ph. https://arxiv.org/list/physics.atom-ph/new
[1/1]:
- Bremsstrahlung induced atomic processes
Singh, Kumar, Chatterjee, Swami, Kaur, Jha, Oswal, Singh, Nandi
https://arxiv.org/abs/2501.02967 https://mastoxiv.page/@arXiv_physicsatomph_bot/113786077273931578
- Probing Instantaneous Single-Molecule Chirality in the Planar Ground State of Formic Acid
D. Tsitsonis, et al.
https://arxiv.org/abs/2503.13318 https://mastoxiv.page/@arXiv_physicsatomph_bot/114182276400669831
- Electronic structure calculation for superheavy elements Livermorium (Lv, Z=116) and Tennessine (...
V. A. Dzuba, V. V. Flambaum, G. K. Vong
https://arxiv.org/abs/2505.22895 https://mastoxiv.page/@arXiv_physicsatomph_bot/114595619538348153
- Fast programmable entanglement of Barium ion qubits using Rydberg states and AC-Stark shifts
Adam R. Vernon, Mitch Peaks
https://arxiv.org/abs/2506.00611 https://mastoxiv.page/@arXiv_physicsatomph_bot/114618331124166707
- Mitigating higher-band heating in Floquet-Hubbard lattices via two-tone driving
Yuanning Chen, Zijie Zhu, Konrad Viebahn
https://arxiv.org/abs/2410.12308 https://mastoxiv.page/@arXiv_condmatquantgas_bot/113321883265330530
- Constructing Quantum Many-Body Scars from Hilbert Space Fragmentation
Fan Yang, Matteo Magoni, Hannes Pichler
https://arxiv.org/abs/2506.10806 https://mastoxiv.page/@arXiv_quantph_bot/114675529198570764
toXiv_bot_toot

Random cubic graph embedded in a hypercube: Entanglement spectrum and many-body localization
Frantisek Slanina
https://arxiv.org/abs/2508.13789 https://arx…

Random cubic graph embedded in a hypercube: Entanglement spectrum and many-body localization
The schematic model of interacting spins is introduced, which combines the symmetry of hypercube with the simplicity of random regular graph with degree three, i.e. the random cubic graph. We study the localization transition in this model, which shares essential characteristics with the systems exhibiting many-body localization. Namely, we investigate the transition in terms of the entanglement entropy and entanglement spectrum. We also show that the most significant indicator of the localizat…

Quantum Blockchain Survey: Foundations, Trends, and Gaps
Saurav Ghosh
https://arxiv.org/abs/2507.13720 https://arxiv.org/pdf/2507.137…

Quantum Blockchain Survey: Foundations, Trends, and Gaps
Quantum computing poses fundamental risks to classical blockchain systems by undermining widely used cryptographic primitives. In response, two major research directions have emerged: post-quantum blockchains, which integrate quantum-resistant algorithms, and quantum blockchains, which leverage quantum properties such as entanglement and quantum key distribution. This survey reviews key developments in both areas, analyzing their cryptographic foundations, architectural designs, and implementat…

Exploring the Interplay Between Quantum Entanglement and Decoherence
Samuel Marquez Gonzalez
https://arxiv.org/abs/2508.14790 https://arxiv.org/pdf/2508.14…

Exploring the Interplay Between Quantum Entanglement and Decoherence
Quantum entanglement manifests as a distinctive correlation between particles that transcends classical boundaries when their quantum states cannot be described independently. On the other hand, as quantum systems interact with their surroundings, decoherence emerges, leading to the gradual decay of quantum coherence and entanglement. In the case of entanglement, this is known as entanglement sudden death (ESD). Decoherence mechanisms are examined, focusing on how various environmental factors,…

Pomeron evolution, entanglement entropy and Abramovskii-Gribov-Kancheli cutting rules
Mustapha Ouchen, Alex Prygarin
https://arxiv.org/abs/2508.12102 https://

Pomeron evolution, entanglement entropy and Abramovskii-Gribov-Kancheli cutting rules
We use Pomeron evolution equation in zero transverse dimension based on the Abramovskii-Gribov-Kancheli~(AGK) cutting rules to calculate the von Neumann entropy and $q$-moments that used as an experimental test for the Koba-Nielsen-Olesen~(KNO) scaling. In order to avoid the negative probabilities that emerge from the negative AGK weights in the Minkowski space, we reformulate the Pomeron evolution in the Euclidean space. The resulting positive definite probabilities for cut and uncut Pomeron…

Entanglement harvesting and curvature of entanglement: A modular operator approach
Rupak Chatterjee
https://arxiv.org/abs/2508.12497 https://arxiv.org/pdf/…

Entanglement harvesting and curvature of entanglement: A modular operator approach
An operator-algebraic framework based on Tomita-Takesaki modular theory is used to study aspects of quantum entanglement via the application of the modular conjugation operator $J$. The entanglement structure of quantum fields is studied through the protocol of entanglement harvesting whereby by quantum correlations evolve through the time evolution of qubit detectors coupled to a Bosonic field. Modular conjugation operators are constructed for Unruh-Dewitt type qubits interacting with a scalar…

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/2]:
- Molecular entanglement as a signature of the Unruh effect
Yuebing Zhou, Jiawei Hu, Hongwei Yu

💯 Scientists produce quantum entanglement-like results without entangled particles in new experiment
https://phys.org/news/2025-08-scientists-quantum-entanglement-results-entangled.html

Scientists produce quantum entanglement-like results without entangled particles in new experiment
In the everyday world that humans experience, objects behave in a predictable way, explained by classical physics. One of the important aspects of classical physics is that nothing, not even information, can travel faster than the speed of light. However, in the 1930s, scientists discovered that very small particles abide by some very different rules. One of the most mind-boggling behaviors exhibited by these particles is quantum entanglement—which Albert Einstein famously called "spooky acti…

1Q: First-Generation Wireless Systems Integrating Classical and Quantum Communication
Petar Popovski, \v{C}edomir Stefanovi\'c, Beatriz Soret, Israel Leyva-Mayorga, Shashi Raj Pandey, Ren\'e B{\o}dker Christensen, Jakob Kaltoft S{\o}ndergaard, Kristian Skafte Jensen, Thomas Garm Pedersen, Angela Sara Cacciapuoti, Lajos Hanzo
https://

1Q: First-Generation Wireless Systems Integrating Classical and Quantum Communication
We sketch out the concept of 1Q, the first wireless generation of integrated classical and quantum communication. The 1Q framework features quantum base stations (QBSs) that support entanglement distribution via free-space optical links alongside traditional radio communications. Key new components include quantum cells, quantum user equipment (QUEs), and hybrid resource allocation spanning classical time-frequency and quantum entanglement domains. Several application scenarios are discussed an…

Quantifying mixed-state entanglement via partial transpose and realignment moments
Poetri Sonya Tarabunga, Tobias Haug
https://arxiv.org/abs/2507.13840 htt…

Quantifying mixed-state entanglement via partial transpose and realignment moments
Entanglement plays a crucial role in quantum information science and many-body physics, yet quantifying it in mixed quantum many-body systems has remained a notoriously difficult problem. Here, we introduce families of quantitative entanglement witnesses, constructed from partial transpose and realignment moments, which provide rigorous bounds on entanglement monotones. Our witnesses can be efficiently measured using SWAP tests or variants of Bell measurements, thus making them directly impleme…

Toward a Consistent Definition of Holographic Entanglement Entropy in de Sitter Space
Shan-Ming Ruan, Yu-ki Suzuki
https://arxiv.org/abs/2508.14478 https://

Toward a Consistent Definition of Holographic Entanglement Entropy in de Sitter Space
We investigate a new definition of holographic entanglement entropy in the framework of static patch holography for de Sitter space. Using the replica trick and twist operator formalism, we derive an entropy functional in three-dimensional de Sitter space expressed through de Sitter Green's functions. Since the naive Ryu-Takayanagi prescription in de Sitter spacetime fails to satisfy strong subadditivity, we demand that our proposed formula be consistent with the fundamental entropic inequaliti…

Entanglement witnesses for stabilizer states and subspaces beyond qubits
Jakub Szczepaniak, Owidiusz Makuta, Remigiusz Augusiak
https://arxiv.org/abs/2508.13734 https://

Entanglement witnesses for stabilizer states and subspaces beyond qubits
Genuine multipartite entanglement is arguably the most valuable form of entanglement in the multipartite case, with applications, for instance, in quantum metrology. In order to detect that form of entanglement in multipartite quantum states, one typically uses entanglement witnesses. The aim of this paper is to generalize the results of [G. Tóth and O. Gühne, Phys. Rev. A \textbf{72}, 022340 (2005)] in order to provide a construction of witnesses of genuine multipartite entanglement tailored…

Crosslisted article(s) found for cond-mat.stat-mech. https://arxiv.org/list/cond-mat.stat-mech/new
[1/1]:
- Entanglement Asymmetry for Higher and Noninvertible Symmetries
Francesco Benini, Pasquale Calabrese, Michele Fossati, Amartya Harsh Singh, Marco Venuti

Non-Commutative weak measurements: Entanglement, Symmetry Breaking, and the Role of Readout
Yuanchen Zhao, Li Rao, Dong E. Liu
https://arxiv.org/abs/2508.15280 https://

Non-Commutative weak measurements: Entanglement, Symmetry Breaking, and the Role of Readout
The preparation of long-range entangled (LRE) states via quantum measurements is a promising strategy, yet its stability against realistic, non-commuting measurement noise remains a critical open question. Here, we systematically investigate the rich phase structure emerging from a minimal model of competing, non-commuting weak measurements: nearest-neighbor Ising ($Z_iZ_j$) and single-qubit transverse ($X_i$) operators. We analyze three experimentally relevant scenarios based on which measurem…

Entanglement architecture of beyond-Landau quantum criticality
Menghan Song, Ting-Tung Wang, Liuke Lyu, William Witczak-Krempa, Zi Yang Meng
https://arxiv.org/abs/2509.09983 htt…

Entanglement architecture of beyond-Landau quantum criticality
Quantum critical points beyond the Landau paradigm exhibit fractionalized excitations and emergent gauge fields. Here, we use entanglement microscopy--full tomography of the reduced density matrix of small subregions and subsequent extraction of their quantum correlations--to resolve the entanglement architecture near such exotic critical points. We focus on genuine multipartite entanglement (GME). Through unbiased quantum Monte Carlo sampling of RDMs across conventional O(2)/O(3) Wilson-Fisher…

Detection of non-absolute separability in quantum states and channels through moments
Bivas Mallick, Saheli Mukherjee, Nirman Ganguly, A. S. Majumdar
https://arxiv.org/abs/2508.15700

Detection of non-absolute separability in quantum states and channels through moments
In quantum information and computation, generation of entanglement through unitary gates remains a significant and active area of research. However, there are states termed as absolutely separable, from which entanglement cannot be created through any non-local unitary action. Thus, from a resource-theoretic perspective, non-absolutely separable states are useful as they can be turned into entangled states using some appropriate unitary gates. In this work, we propose an efficient method to det…

Christianity, Nationalism, and Ideology in a Globalized World
https://ift.tt/oO4zvAL
Summer 2026 Vietnamese Language Study with Indiana University Kathleen Evans 09/19/2025 - 9:31am …
via Input 4 RELCFP

Studies of properties of bipartite graphs with quantum programming
Kh. P. Gnatenko
https://arxiv.org/abs/2507.16653 https://arxiv.org…

Studies of properties of bipartite graphs with quantum programming
Multi-qubit quantum states corresponding to bipartite graphs $G(U,V,E)$ are examined. These states are constructed by applying $CNOT$ gates to an arbitrary separable multi-qubit quantum state. The entanglement distance of the resulting states is derived analytically for an arbitrary bipartite graph structure. A relationship between entanglement and the vertex degree is established. Additionally, we identify how quantum correlators relate to the number of vertices with odd and even degrees in th…

Holographic Timelike Entanglement Across Dimensions
Carlos Nunez, Dibakar Roychowdhury
https://arxiv.org/abs/2508.13266 https://arxiv.org/pdf/2508.13266

Holographic Timelike Entanglement Across Dimensions
We develop a holographic framework for computing timelike entanglement entropy (tEE) in quantum field theories, extending the Ryu-Takayanagi prescription into Lorentzian settings. Using three broad classes of supergravity backgrounds, we derive both exact and approximate tEE expressions for slab, spherical, and hyperbolic regions, and relate them to the central charges of the dual conformal field theories. The method is applied to infinite families of supersymmetric linear quivers in dimensions…

A Mixed-Order Phase Transition in Continuous-Variable Quantum Networks
Yaqi Zhao, Kan He, Yongtao Zhang, Jinchuan Hou, Jianxi Gao, Shlomo Havlin, Xiangyi Meng
https://arxiv.org/abs/2507.16417

A Mixed-Order Phase Transition in Continuous-Variable Quantum Networks
Quantum networks (QNs) have been predominantly driven by discrete-variable (DV) architectures. Yet, many optical platforms naturally generate Gaussian states--the common states of continuous-variable (CV) systems, making CV-based QNs an attractive route toward scalable, chip-integrated quantum computation and communication. To bridge the conceptual gap between well-studied DV entanglement percolation theories and their CV counterpart, we introduce a Gaussian-to-Gaussian entanglement distributio…

Entanglement entropy of particles in a perturbative scattering
Jinbo Fan, Xuanting Ji, Xi-Jun Ren
https://arxiv.org/abs/2508.12612 https://arxiv.org/pdf/25…

Entanglement entropy of particles in a perturbative scattering
The entanglement among scattering particles in an exemplary quantum electrodynamics (QED) process is studied perturbatively. To increase the computational accuracy, we need to consider virtual photon loop diagrams, which lead to infrared divergence. Therefore, when including higher-order corrections in perturbative theory, we use the dressed state formalism proposed by Chuang and Faddeev-Kulish, which provides a finite S-matrix element. The entanglement entropy calculation shows that the entang…

\nu-QSSEP: A toy model for entanglement spreading in stochastic diffusive quantum systems
Vincenzo Alba
https://arxiv.org/abs/2507.11674 https://

ν-QSSEP: A toy model for entanglement spreading in stochastic diffusive quantum systems
We investigate out-of-equilibrium entanglement dynamics in a generalization of the so-called $QSSEP$ model, which is a free-fermion chain with stochastic in space and time hopping amplitudes. In our setup, the noisy amplitudes are spatially-modulated satisfying a $ν$-site translation invariance but retaining their randomness in time. For each noise realization, the dynamics preserves Gaussianity, which allows to obtain noise-averaged entanglement-related quantities. The statistics of the stead…

Piecemaker: a resource-efficient entanglement distribution protocol
Luise Prielinger, Kenneth Goodenough, Guus Avis, Stefan Krastanov, Don Towsley, Gayane Vardoyan
https://arxiv.org/abs/2508.14737

Piecemaker: a resource-efficient entanglement distribution protocol
We introduce multipartite entanglement distribution protocols that use a quantum switch to deliver stabilizer states to a number of remote end users. As in existing schemes, the first step in our protocols involves Bell pair generation between the switch and each end user. However, unlike existing schemes that wait for all Bell pairs to be established before distributing the desired state -- for example, via a projective measurement -- our approach stores only a minimal subset of Bell pairs whi…

Living on the edge: a non-perturbative resolution to the negativity of bulk entropies
Stefano Antonini, Luca V. Iliesiu, Pratik Rath, Patrick Tran
https://arxiv.org/abs/2509.15295

Living on the edge: a non-perturbative resolution to the negativity of bulk entropies
Lin, Maldacena, Rozenberg, and Shan (LMRS) presented a new information paradox in black hole physics by noticing that the entanglement and Rényi entropies in a two-sided black hole can become negative when the geometry contains a very large number of matter excitations behind the black hole horizon. While originally this puzzle was presented in the context of BPS two-sided black holes in two-dimensional supergravity, the negativity in fact persists for more general two-sided black holes in the…

Simplified scheme for continuous-variable entanglement distillation: multicopy distillation of Gaussian entanglement without heralding Gaussian measurements
Jarom\'ir Fiur\'a\v{s}ek
https://arxiv.org/abs/2509.15065

Simplified scheme for continuous-variable entanglement distillation: multicopy distillation of Gaussian entanglement without heralding Gaussian measurements
Entanglement of continuous-variable Gaussian states can be distilled by combination of de-Gaussifying operation such as single-photon subtraction and iterative heralded Gaussification. Here we present and analyze a simplified equivalent version of such entanglement distillation protocol, where the Gaussian measurements utilized in heralded Gaussification are eliminated and are absorbed into the preparation of suitable input Gaussian states of the simplified protocol. The simplified scheme conta…

Error exponents for tripartite-to-bipartite entanglement transformations
P\'eter Vrana
https://arxiv.org/abs/2507.13778 https://a…

Error exponents for tripartite-to-bipartite entanglement transformations
We consider distillation of ebits between a specified pair of subsystems from pure tripartite states by local operations and classical communication. It is known that, allowing an asymptotically vanishing error, the maximal rate is the minimum of the von Neumann entropies of the two corresponding marginals, and under asymptotic stochastic local operations and classical communication the maximal rate is given by a minimization over a one-parameter family of entanglement measures. In this paper, …

Bell Inequality Violations Without Entanglement? It's Just Postselection
Ken Wharton, Huw Price
https://arxiv.org/abs/2508.13431 https://arxiv.org/pdf/…

Bell Inequality Violations Without Entanglement? It's Just Postselection
Recently Wang et al. have reported a violation of a Bell inequality without entanglement [arXiv:2507.07756]. We show that their result is an artifact of postselection. It is well known that postselection may yield Bell inequality violations, both in classical toy models and in real experiments with delayed-choice entanglement-swapping. Here we describe a classical analog of Wang et al.'s experiment, and show that it produces essentially the same results as their quantum version. We explain in d…

Stochastic Entanglement Configuration for Constructive Entanglement Topologies in Quantum Machine Learning with Application to Cardiac MRI
Mehri Mehrnia, Mohammed S. M. Elbaz
https://arxiv.org/abs/2507.11401

Stochastic Entanglement Configuration for Constructive Entanglement Topologies in Quantum Machine Learning with Application to Cardiac MRI
Efficient entanglement strategies are essential for advancing variational quantum circuits (VQCs) for quantum machine learning (QML). However, most current approaches use fixed entanglement topologies that are not adaptive to task requirements, limiting potential gains over classical models. We introduce a novel stochastic entanglement configuration method that systematically generates diverse entanglement topologies to identify a subspace of constructive entanglement configurations, defined as…

Tripartite Entanglement Signal from Multipartite Entanglement of Purification
Ning Bao, Keiichiro Furuya, Joydeep Naskar
https://arxiv.org/abs/2509.08209 https://

Tripartite Entanglement Signal from Multipartite Entanglement of Purification
We propose a signal $Δ^{(3)}_p$ for genuine tripartite entanglement in finite-dimensional quantum systems and $Δ^{(3)}_w$ for holographic systems. We prove that $Δ^{(3)}_p$ is non-negative for any tripartite entangled mixed states. Based on the conjecture, the equality between an entanglement wedge cross section $E_w$ and entanglement of purification $E_p$, i.e., $E_w = E_P$ in the semiclassical limit, we apply the tripartite entanglement measure to study the structures of tripartite entangl…

Entanglement-enhanced imaging through scattering media
Chlo\'e Verni\`ere, Rapha\"el Guitter, Baptiste Courme, Hugo Defienne
https://arxiv.org/abs/2508.14616 https://…

Entanglement-enhanced imaging through scattering media
Scattering in complex media scrambles light, obscuring images and hindering applications ranging from astronomy to microscopy. While computational algorithms and wavefront shaping can, in principle, reverse this mixing by exploiting the near-linear nature of light propagation, in practice the inversion process is highly susceptible to limitations such as the finite number of controllable modes, noise, losses, and inaccuracies in the forward model. Consequently, these approaches are only effecti…

Spatial structure of multipartite entanglement at measurement induced phase transitions
James Allen, William Witczak-Krempa
https://arxiv.org/abs/2509.12109 https://

Spatial structure of multipartite entanglement at measurement induced phase transitions
We study multiparty entanglement near measurement induced phase transitions (MIPTs), which arise in ensembles of local quantum circuits built with unitaries and measurements. In contrast to equilibrium quantum critical transitions, where entanglement is short-ranged, MIPTs possess long-range k-party genuine multiparty entanglement (GME) characterized by an infinite hierarchy of entanglement exponents for k >= 2. First, we represent the average spread of entanglement with "entanglement clusters"…

Genuine multipartite entanglement verification with convolutional neural networks
Yi-Jun Luo, Xuan Leng, Chengjie Zhang
https://arxiv.org/abs/2508.13463 https://

Genuine multipartite entanglement verification with convolutional neural networks
In recent years, the detection of genuine multipartite entanglement (GME) via machine learning has received scant attention. Here, we employ convolutional neural networks (CNNs), as well as CNNs enhanced with squeeze-and-excitation (SE) to detect GME. We randomly generated GME states with 4 to 6 qubits and GHZ-diagonal states ranging from 4 to 20 qubits using the semidefinite programming approach. Subsequently, we assessed their classification accuracy. Our results demonstrate that the integrat…

Free-Particle State Realized via Optimal Filtering in Optomechanics: Implications for Gravity-Induced Entanglement
Ryotaro Fukuzumi, Kosei Hatakeyama, Daisuke Miki, Kazuhiro Yamamoto
https://arxiv.org/abs/2508.14337

Free-Particle State Realized via Optimal Filtering in Optomechanics: Implications for Gravity-Induced Entanglement
We analyze the conditional quantum state of a mechanical mirror in an optomechanical system under continuous measurement, feedback control, and quantum filtering. Our study identifies a regime in which the mirror's momentum is squeezed beyond the standard quantum limit achievable through appropriate tuning of the homodyne detection angle. We show that in this regime, optimal filtering effectively realizes a free-particle-like state. Notably, when applied to a setup involving two optomechanical …

Proof of a Generalized Ryu-Takayanagi Conjecture
Artem Averin
https://arxiv.org/abs/2508.14877 https://arxiv.org/pdf/2508.14877

Proof of a Generalized Ryu-Takayanagi Conjecture
We derive a generalized version of the Ryu-Takayanagi formula for the entanglement entropy in arbitrary diffeomorphism invariant field theories. We use a recent framework which expresses the measurable quantities of a quantum theory as a weighted sum over paths in the theory's phase space. If this framework is applied to a field theory on a spacetime foliated by a hypersurface $Σ,$ the choice of a codimension-2 surface $B$ without boundary contained in $Σ$ specifies a submanifold in the phase…

Entanglement Classification in the Graph States: The generalization to $n$-Qubits States using the Entanglement Matrix
Sameer Sharma
https://arxiv.org/abs/2507.11458

Entanglement Classification in the Graph States: The generalization to $n$-Qubits States using the Entanglement Matrix
Graph states represent a significant class of multi-partite entangled quantum states with applications in quantum error correction, quantum communication, and quantum computation. In this work, we introduce a novel formalism called the Entanglement Matrix for quantifying and classifying entanglement in n-qubit graph states. Leveraging concepts from graph theory and quantum information, we develop a systematic approach to analyze entanglement by identifying primary and secondary midpoints in gra…

Quantum teleportation of an elemental silicon nanophotonic CNOT gate
Kai-Chi Chang, Xiang Cheng, Felix Ribuot-Hirsch, Murat Can Sarihan, Yujie Chen, Jaime Gonzalo Flor Flores, Mingbin Yu, Patrick Guo-Qiang Lo, Dim-Lee Kwong, Chee Wei Wong
https://arxiv.org/abs/2507.16783

Quantum teleportation of an elemental silicon nanophotonic CNOT gate
Large-scale quantum computers possess the capacity to effectively tackle practical problems that can be insurmountable for classical computers. The main challenge in building these quantum computers is to realize scalable modules for remote qubits and entanglement. By assembling small, specialized parts into a larger architecture, the modular approach mitigates complexity and uncertainty. Such a distributed architecture requires non-local quantum gate operations between remote qubits. An essent…

Quantum Enhanced Anomaly Detection for ADS-B Data using Hybrid Deep Learning
Rani Naaman, Felipe Gohring de Magalhaes, Jean-Yves Ouattara, Gabriela Nicolescu
https://arxiv.org/abs/2509.15991

Quantum Enhanced Anomaly Detection for ADS-B Data using Hybrid Deep Learning
The emerging field of Quantum Machine Learning (QML) has shown promising advantages in accelerating processing speed and effectively handling the high dimensionality associated with complex datasets. Quantum Computing (QC) enables more efficient data manipulation through the quantum properties of superposition and entanglement. In this paper, we present a novel approach combining quantum and classical machine learning techniques to explore the impact of quantum properties for anomaly detection …

Parametric Amplification of Spin-Motion Coupling in Three-Dimensional Trapped-Ion Crystals
Samarth Hawaldar, N. Nikhil, Ana Maria Rey, John J. Bollinger, Athreya Shankar
https://arxiv.org/abs/2507.16741

Parametric Amplification of Spin-Motion Coupling in Three-Dimensional Trapped-Ion Crystals
Three-dimensional (3D) crystals offer a route to scale up trapped ion systems for quantum sensing and quantum simulation applications. However, engineering coherent spin-motion couplings and effective spin-spin interactions in large crystals poses technical challenges associated with decoherence and prolonged timescales to generate appreciable entanglement. Here, we explore the possibility to speed up these interactions in 3D crystals via parametric amplification. We derive a general Hamiltonia…

Single-Round Deterministic Quantum Anonymous Veto Using Bell States
Ravi Sangwan, Harishankar Mishra, Henry Sukumar, Gudapati Naresh Raghava
https://arxiv.org/abs/2509.15951 htt…

Single-Round Deterministic Quantum Anonymous Veto Using Bell States
Quantum Anonymous Veto (QAV) protocols enable secure and anonymous decision-making by allowing participants to detect the presence of a veto without revealing individual choices. While existing QAV schemes offer strong theoretical guarantees, they face significant limitations in practical implementation due to resource requirements, scalability issues, and the need for multipartite entanglement. In this work, we propose a novel deterministic QAV protocol that leverages only bipartite entangleme…

Measurement-Driven Transitions between Area Law Phases
Hui Yu, Jiangping Hu
https://arxiv.org/abs/2509.15634 https://arxiv.org/pdf/2509.15634

Measurement-Driven Transitions between Area Law Phases
In recent years, quantum circuits consisting of unitary gates and projective measurements have become valuable tools for stimulating or preparing quantum many-body states with non-trivial properties. Here, we introduce and examine a measurement-only circuit (the projective quantum Ising model with three-spin interactions) that involves three non-commuting projective measurements. This model features three distinct phases, separated by two critical lines. We utilize two entanglement measures (to…

Reconfigurable qubit states and quantum trajectories in a synthetic artificial neuron network with a process to direct information generation from co-integrated burst-mode spiking under non-Markovianity
Osama M. Nayfeh, Chris S. Horne
https://arxiv.org/abs/2507.16669

Reconfigurable qubit states and quantum trajectories in a synthetic artificial neuron network with a process to direct information generation from co-integrated burst-mode spiking under non-Markovianity
A synthetic artificial neuron network functional in a regime where quantum information processes are co-integrated with spiking computation provides significant improvement in the capabilities of neuromorphic systems in performing artificial intelligence and autonomy tasks. This provides the ability to execute with the qubit coherence states and entanglement as well as in tandem to perform functions such as read out and basic arithmetic with conventional spike-encoding. Ultimately, this enables…

Entanglement Entropy in Jackiw-Teitelboim de Sitter gravity with Timelike Boundaries
Timofei Rusalev
https://arxiv.org/abs/2509.12975 https://arxiv.org/pdf…

Entanglement Entropy in Jackiw-Teitelboim de Sitter gravity with Timelike Boundaries
The consideration of timelike boundaries in de Sitter static patches has a broad motivation, such as the formulation of a well-defined canonical ensemble and the realization of a natural framework for static patch holography. In this work we study Jackiw-Teitelboim de Sitter gravity with symmetric timelike reflecting boundaries, which, in the presence of both cosmological and "black hole" horizons, naturally separate the spacetime into a "black hole system" and a "cosmological system". We apply…

Symmetry Resolved Multipartite Entanglement Entropy
Ashwat Jain
https://arxiv.org/abs/2509.13410 https://arxiv.org/pdf/2509.13410

Symmetry Resolved Multipartite Entanglement Entropy
We perform the symmetry resolution of a multipartite entanglement measure, namely the global entanglement $Q$ introduced by Meyer and Wallach [2002, J. of Math. Phys., 43, pp. 4273] for all systems of distinguishable particles hosting a locally acting symmetry. For an ensemble of Haar random states we find agreement with equipartition, with leading order behaviour and finite size corrections which follow a power law scaling with the number of local degrees of freedom. Implications of this resul…

Dark-state photonic entanglement filters
Stefano Longhi
https://arxiv.org/abs/2507.13016 https://arxiv.org/pdf/2507.13016

Dark-state photonic entanglement filters
Preserving entanglement in the presence of decoherence remains a major challenge for quantum technologies. Recent proposals [M.A. Selim et al., Science 387, 1424 (2025)] have employed photonic filters based on anti-parity-time symmetry to recover certain entangled states, but these approaches require intricate, symmetry-constrained waveguide architectures and precise bath engineering. In this work, we show that such strict non-Hermitian symmetry constraints are not necessary for entanglement fi…

Gravity-mediated entanglement via infinite-dimensional systems
Stefan L. Ludescher, Leon D. Loveridge, Thomas D. Galley, Markus P. M\"uller
https://arxiv.org/abs/2507.13201

Gravity-mediated entanglement via infinite-dimensional systems
There has been a wave of recent interest in detecting the quantum nature of gravity with table-top experiments that witness gravitationally mediated entanglement. Central to these proposals is the assumption that any mediator capable of generating entanglement must itself be nonclassical. However, previous arguments for this have modelled classical mediators as finite, discrete systems such as bits, which excludes physically relevant continuous and infinite-dimensional systems such as those of …

Emergence of Generic Entanglement Structure in Doped Matchgate Circuits
Alessio Paviglianiti, Luca Lumia, Emanuele Tirrito, Alessandro Silva, Mario Collura, Xhek Turkeshi, Guglielmo Lami
https://arxiv.org/abs/2507.12526

Emergence of Generic Entanglement Structure in Doped Matchgate Circuits
Free fermionic Gaussian, a.k.a. matchgate, random circuits exhibit atypical behavior compared to generic interacting systems. They produce anomalously slow entanglement growth, characterized by diffusive scaling $S(t) \sim \sqrt{t}$, and evolve into volume-law entangled states at late times, $S \sim N$, which are highly unstable to measurements. Here, we investigate how doping such circuits with non-Gaussian resources (gates) restores entanglement structures of typical dynamics. We demonstrate …

New Localizable Entanglement
Abbaas Sabour, Fereydoon Khazali, Soghra Ghanavati
https://arxiv.org/abs/2507.11020 https://arxiv.org/pd…

New Localizable Entanglement
In this study, we have addressed an ambiguity in the concept of localizable entanglement (LE) introduced by Verstraete et al in 2004. By doing so, we have proposed and explored a unique form of this entanglement, called new localizable entanglement (NLE). We have shown that NLE is always less than or equal to LE. Additionally, we have demonstrated that for systems with three components, NLE does not differ significantly from LE. However, when the number of components increases to four, there is…

Entanglement production in the Sachdev-Ye-Kitaev Model and its variants
Tanay Pathak, Masaki Tezuka
https://arxiv.org/abs/2507.10892 https://

Entanglement production in the Sachdev-Ye-Kitaev Model and its variants
Understanding how quantum chaotic systems generate entanglement can provide insight into their microscopic chaotic dynamics and can help distinguish between different classes of chaotic behavior. Using von Neumann entanglement entropy, we study a nonentangled state evolved under three variants of the Sachdev-Ye-Kitaev (SYK) model with a finite number of Majorana fermions $N$. All the variants exhibit linear entanglement growth at early times, which at late times saturates to a universal value c…

Autonomous stabilization of remote entanglement in a cascaded quantum network
Abdullah Irfan, Kaushik Singirikonda, Mingxing Yao, Andrew Lingenfelter, Michael Mollenhauer, Xi Cao, Aashish A. Clerk, Wolfgang Pfaff
https://arxiv.org/abs/2509.11872

Autonomous stabilization of remote entanglement in a cascaded quantum network
Remote entanglement between independent and widely separated qubits is an essential quantum phenomenon and a critical resource for quantum information applications. Generating entanglement between qubits at arbitrary distances requires the distribution of propagating quantum states. This necessity raises the intriguing question whether the entanglement can be stabilized indefinitely, instead of only periodically reestablished after decay. Here, we report autonomous stabilization of entanglement…

Resource-efficient entanglement detection in high-dimensional states via two-qubit witnesses
Josef Kadlec, Artur Barasi\'nski, Karel Lemr
https://arxiv.org/abs/2509.13061 ht…

Resource-efficient entanglement detection in high-dimensional states via two-qubit witnesses
This paper presents an efficient method for detecting entanglement in high-dimensional two-qudit states by mapping the Hilbert space onto the space of two qubits. This transformation enables the use of well-established two-qubit entanglement witnesses. The proposed approach is not restricted to any specific class of states, successfully identifies a vast majority of pure entangled states, and requires a number of measurements that does not increase with the dimensionality of the qudits. The met…

Hybrid Fiber-Free-Space Entanglement Distribution Using Off-the-Shelf Quantum Devices
Gustavo C. Amaral, Nienke M. ten Haaf, Breno Perlingeiro, David L. Bakker, Mark G. M. Boekel, Tim E. van Duivenbode, Karthik Selvan, Nicolas Oidtmann, Rafael Ochsendorf, Rick N. M. Wasserman, Mael Flament, Felipe Giraldo, Shane Andrewski, Mehdi Namazi, Federica Facchin, Mario Casta\~neda, Fokko de Vries, Sayali Shevate, Shaurya Bhave, Marco Gorter, Nico Coesel, David Mytling, Mike Mabry, Carlo Page, A…

Hybrid Fiber-Free-Space Entanglement Distribution Using Off-the-Shelf Quantum Devices
Entanglement serves as a fundamental resource for quantum technologies, enabling communication and computation tasks that surpass classical limits. Its distribution across networks is essential for interconnecting quantum processors, enabling distributed quantum computing to address complex challenges in areas such as drug discovery, material science, and optimization. In this work, we report the successful distribution of polarization-entangled photon pairs across a campus-scale, three-node qu…

Quantum state engineering of maximally entangled photon pairs by path identity
Richard Bernecker, Baghdasar Baghdasaryan, Stephan Fritzsche
https://arxiv.org/abs/2508.13638 http…

Quantum state engineering of maximally entangled photon pairs by path identity
Cutting-edge quantum technologies lean on sources of high-dimensional entangled states (HDES) that reliably prepare high-fidelity target states. The idea to overlap photon paths from distinct but indistinguishable sources was recently introduced for the creation of HDES, known as entanglement by path identity. In this regard, the use of orbital angular momentum (OAM) modes is promising, as they offer a high-dimensional and discrete Hilbert space to encode information. While entanglement by path…

Generation and certification of pure phase entangled light
Rounak Chatterjee, Mayuresh Kanagal, Vikas S Bhat, Kiran Bajar, Sushil Mujumdar
https://arxiv.org/abs/2508.11418 https…

Generation and certification of pure phase entangled light
Biphoton systems exhibiting entanglement in position-momentum variables, known as spatial entanglement, are among the most intriguing and well-studied phenomena in quantum optics. A notable subset of these are phase entangled states, where entanglement manifests purely through correlations in the spatial phase of the wavefunction. While the generation of such states from biphotons via spontaneous parametric down-conversion has been explored, their physical implications and applications remain u…

Block entanglement bounds distribution of regionally localized entanglement
Jithin G. Krishnan, Aditi Sen De, Amit Kumar Pal
https://arxiv.org/abs/2508.05431 https://

Block entanglement bounds distribution of regionally localized entanglement
In quantum networks, eliminating connections between nodes is crucial to mitigate the effects of decoherence, often achieved by performing measurements on nodes that are idle, or vulnerable to noise. To characterize the entanglement content of the resulting smaller network, we introduce the notion of ``regionally localized entanglement", defined as the average entanglement concentrated over a two-qubit region in a multi-qubit system. Hence, the total regionally localized entanglement can be obt…

Entanglement-efficiency trade-offs in the fusion-based generation of photonic GHZ-like states
A. A. Melkozerov, M. Yu. Saygin, S. S. Straupe
https://arxiv.org/abs/2507.12389

Entanglement-efficiency trade-offs in the fusion-based generation of photonic GHZ-like states
Probabilistic entangling measurements are key operations in linear-optical quantum technologies, enabling the generation and manipulation of high-dimensional quantum states. While prior research has focused predominantly on specific entangled states, notably graph states and Greenberger-Horne-Zeilinger (GHZ) states, broader classes of states with variable entanglement remain underexplored. In this work, we present a linear-optical approach for generating and fusing GHZ-like states, which genera…

Spectral Small-Incremental-Entangling: Breaking Quasi-Polynomial Complexity Barriers in Long-Range Interacting Systems
Donghoon Kim, Yusuke Kimura, Hugo Mackay, Yosuke Mitsuhashi, Hideaki Nishikawa, Carla Rubiliani, Cheng Shang, Ayumi Ukai, Tomotaka Kuwahara
https://arxiv.org/abs/2509.12014

Spectral Small-Incremental-Entangling: Breaking Quasi-Polynomial Complexity Barriers in Long-Range Interacting Systems
A key challenge in quantum complexity is how entanglement structure emerges from dynamics, highlighted by advances in simulators and information processing. The Lieb--Robinson bound sets a locality-based speed limit on information propagation, while the Small-Incremental-Entangling (SIE) theorem gives a universal constraint on entanglement growth. Yet, SIE bounds only total entanglement, leaving open the fine entanglement structure. In this work, we introduce Spectral-Entangling Strength, measu…

Unified Construction of Genuine Multipartite Entanglement Measures Based on Geometric Mean and its Applications
Zong Wang, Zhihao Ma, Lin Chen, Chengjie Zhang, Shao-Ming Fei
https://arxiv.org/abs/2508.10301

Unified Construction of Genuine Multipartite Entanglement Measures Based on Geometric Mean and its Applications
Genuine multipartite entanglement (GME) is an important resource in quantum information processing. We systematically study the measures of GME based on the geometric mean of bi-partition entanglements and present a unified construction of GME measures, which gives rise to the widely used GME measures including GME concurrence, the convex-roof extended negativity of GME, the geometric measure of entanglement of GME. Our GME measures satisfy the desirable conditions such as scalability and smoot…

Quantum Shadows: The Dining Information Brokers
Theodore Andronikos, Constantinos Bitsakos, Konstantinos Nikas, Georgios I. Goumas, Nectarios Koziris
https://arxiv.org/abs/2507.13810

Quantum Shadows: The Dining Information Brokers
This article introduces the innovative Quantum Dining Information Brokers Problem, presenting a novel entanglement-based quantum protocol to address it. The scenario involves $n$ information brokers, all located in distinct geographical regions, engaging in a metaphorical virtual dinner. The objective is for each broker to share a unique piece of information with all others simultaneously. Unlike previous approaches, this protocol enables a fully parallel, single-step communication exchange amo…

Resource-efficient linear-optical generation of GHZ-like states
Suren A. Fldzhyan, Stanislav S. Straupe, Mikhail Yu. Saygin
https://arxiv.org/abs/2509.14794 https://

Resource-efficient linear-optical generation of GHZ-like states
Heralded multi-photon entanglement generation is a central bottleneck for photonic quantum computing, where resource costs typically skyrocket with target size. We explore efficient methods for generating photon states with tunable entanglement, providing a flexible tool for quantum state engineering. We introduce a theoretical framework that has been numerically validated, demonstrating the capacity to generate GHZ-like states incrementally from non-logical intermediate states. We demonstrate …

Single-click protocols for remote state preparation using weak coherent pulses
Janice van Dam, Emil R. Hellebek, Tzula B. Propp, Junior R. Gonzales-Ureta, Anders S. S{\o}rensen, Stephanie D. C. Wehner
https://arxiv.org/abs/2508.14857

Single-click protocols for remote state preparation using weak coherent pulses
Remote state preparation (RSP) allows one party to remotely prepare a known quantum state on another party's qubit using entanglement. This can be used in quantum networks to perform applications such as blind quantum computing or long-distance quantum key distribution (QKD) with quantum repeaters. Devices to perform RSP, referred to as a client, ideally have low hardware requirements, such as only sending photonic qubits. A weak coherent pulse source offers a practical alternative to true sing…

Detecting $k$-nonstretchability via a class of informationally complete symmetric measurements
Yan Hong, Mengjia Zhang, Limin Gao, Huaqi Zhou, Limei Zhang
https://arxiv.org/abs/2508.12817

Detecting $k$-nonstretchability via a class of informationally complete symmetric measurements
Multipartite entanglement characterization is a core problem in quantum information theory, with several classification schemes available. Among these, the $k$-stretchability, recently introduced [Szalay, Quantum 3, 204 (2019)], can be used to describe multipartite entanglement structure. Recently, a class of symmetric measurements (informationally complete $(s,t)$-POVMs) has been proposed [Siudzi$\textrm{ń}$ska, Phys. Rev. A \textbf{105}, 042209 (2022)] , which includes GSIC-POVMs and MUMs. I…

Multi-player conflict avoidance through entangled quantum walks
Honoka Shiratori, Tomoki Yamagami, Etsuo Segawa, Takatomo Mihana, Andr\'e R\"ohm, Ryoichi Horisaki
https://arxiv.org/abs/2508.14456

Multi-player conflict avoidance through entangled quantum walks
Quantum computing has the potential to solve complex problems faster and more efficiently than classical computing. It can achieve speedups by leveraging quantum phenomena like superposition, entanglement, and tunneling. Quantum walks (QWs) form the foundation for many quantum algorithms. Unlike classical random walks, QWs exhibit quantum interference, leading to unique behaviors such as linear spreading and localization. These properties make QWs valuable for various applications, including un…

Entanglement certification from moments of positive maps
Qing-Hua Zhang, Xiaoyu Ma, Shao-Ming Fei
https://arxiv.org/abs/2508.09766 https://arxiv.org/pdf/25…

Entanglement certification from moments of positive maps
Entanglement certification is crucial in physical experiments, particularly when only partial knowledge of the quantum state is available. In this context, we present an entanglement criterion based on positive but not completely positive maps, which eliminates the need to identify eigenvalues of the output state. Notably, the Faddeev-LeVerrier algorithm establishes a relationship between the coefficients of characteristic polynomials and the moments of a matrix. This enables the existence of n…

Exploring near critical lattice gauge simulators with Rydberg atoms facilities
Avi Kaufman, James Corona, Zane Ozzello, Blake Senseman, Muhammad Asaduzzaman, Yannick Meurice
https://arxiv.org/abs/2507.14128

Exploring near critical lattice gauge simulators with Rydberg atoms facilities
We motivate the use of a ladder of Rydberg atoms as an analog simulator for a lattice gauge theory version of scalar electrodynamics also called the compact Abelian Higgs model. We demonstrate that by using a few thousand shots from a single copy of the ladder simulator it is possible to estimate the bipartite quantum von Neumann entanglement entropy $S^{vN}_A$. The estimation relies on an optimized filtration of the mutual information associated with the bitstrings obtained from public facilit…

Entanglement and magic on the light-front
Sam Alterman, Peter J. Love
https://arxiv.org/abs/2507.10777 https://arxiv.org/pdf/2507.107…

Entanglement and magic on the light-front
In the light-front (LF) formulation of quantum field theory (QFT), physics is formulated from the perspective of a massless observer necessarily traveling at the speed of light. The LF formulation provides an alternative computational approach to lattice gauge theory, and has recently been investigated as a future application of quantum computers. A natural question is how quantum resources such as entanglement and contextuality amongst physical qubits in the laboratory are utilized in LF simul…

Role of quantum state texture in probing resource theories and quantum phase transition
Ayan Patra, Tanoy Kanti Konar, Pritam Halder, Aditi Sen De
https://arxiv.org/abs/2507.13862

Role of quantum state texture in probing resource theories and quantum phase transition
Building on the recently developed quantum state texture resource theory, we exhibit that the difference between maximum and minimum textures is a valid purity monotone in any dimension and provide a lower bound for existing purity measures. We introduce a texture-based resource monotone applicable across general convex resource theories, encompassing quantum coherence, non-stabilizerness, and entanglement. In particular, we propose the notion of non-local texture, which corresponds to the geom…

The Role of Entanglement in Quantum Reservoir Computing with Coupled Kerr Nonlinear Oscillators
Ali Karimi, Hadi Zadeh-Haghighi, Youssef Kora, Christoph Simon
https://arxiv.org/abs/2508.11175

The Role of Entanglement in Quantum Reservoir Computing with Coupled Kerr Nonlinear Oscillators
Quantum Reservoir Computing (QRC) uses quantum dynamics to efficiently process temporal data. In this work, we investigate a QRC framework based on two coupled Kerr nonlinear oscillators, a system well-suited for time-series prediction tasks due to its complex nonlinear interactions and potentially high-dimensional state space. We explore how its performance in time-series prediction depends on key physical parameters: input drive strength, Kerr nonlinearity, and oscillator coupling, and analyz…

High-dimensional topological photonic entanglement
M. Javad Zakeri, Armando Perez-Leija, Andrea Blanco-Redondo
https://arxiv.org/abs/2509.14164 https://arx…

High-dimensional topological photonic entanglement
The robust generation and manipulation of high-dimensional quantum states lies at the heart of modern quantum computation. The use of topology to resiliently encode and transport quantum information has been widely investigated in condensed matter and has recently penetrated quantum photonics. However, a route to scale up to a large number of entangled topological photonic modes had been missing. Here, we propose and experimentally demonstrate a method to generate high-dimensional topological p…

Spectral Transitions of the Entanglement Hamiltonian in Monitored Free Fermions
Karim Chahine, Michael Buchhold
https://arxiv.org/abs/2509.08584 https://ar…

Spectral Transitions of the Entanglement Hamiltonian in Monitored Free Fermions
We numerically investigate measurement-induced phase transitions in monitored free fermions through the spectral and eigenstate properties of the entanglement Hamiltonian. By analyzing entanglement scaling, we identify three non-trivial fixed points, for which the entanglement follows exact analytical scaling forms: chaotic unitary dynamics at infinitesimal monitoring, characterized by a Gaussian Page law; a Fermi-liquid fixed point at moderate monitoring, defining a metallic phase with logarit…

Entanglement in Quantum Systems Based on Directed Graphs
Lucio De Simone, Roberto Franzosi
https://arxiv.org/abs/2509.05214 https://arxiv.org/pdf/2509.0521…

Entanglement in Quantum Systems Based on Directed Graphs
We investigate the entanglement properties of quantum states associated with directed graphs. Using a measure derived from the Fubini-Study metric, we quantitatively relate multipartite entanglement to the local connectivity of the graph. In \emph{Entanglement in Directed Graph States}, (2025), arXiv:2505.10716, it is demonstrated that the vertex degree distribution fully determines this entanglement measure and remains invariant under vertex relabeling, highlighting its topological character. …

Bohmian Chaos and Entanglement in a Two-Qubit System
Athanasios C. Tzemos, George Contopoulos, Foivos Zanias
https://arxiv.org/abs/2509.10229 https://arxiv…

Bohmian Chaos and Entanglement in a Two-Qubit System
We study in detail the critical points of Bohmian flow, both in the inertial frame of reference (Y-points) and in the frames centered at the moving nodal points of the guiding wavefunction (X-points), and analyze their role in the onset of chaos in a system of two entangled qubits. We find the distances between these critical points and a moving Bohmian particle at varying levels of entanglement, with particular emphasis on the times at which chaos arises. Then, we find why some trajectories ar…

Entanglement phases and phase transitions in monitored free fermion system due to localizations
Yu-Jun Zhao, Xuyang Huang, Yi-Rui Zhang, Han-Ze Li, Jian-Xin Zhong
https://arxiv.org/abs/2509.09538

Entanglement phases and phase transitions in monitored free fermion system due to localizations
In recent years, the presence of local potentials has significantly enriched and diversified the entanglement patterns in monitored free fermion systems. In our approach, we employ the stochastic Schrödinger equation to simulate a one-dimensional spinless fermion system under continuous measurement and local potentials. By averaging the steady-state entanglement entropy over many quantum trajectories, we investigate its dependence on measurement and localization parameters. We used a phenomeno…

Entanglement Assisted Non-local Optical Interferometry in a Quantum Network
P. -J. Stas, Y. -C. Wei, M. Sirotin, Y. Q. Huan, U. Yazlar, F. Abdo Arias, E. Knyazev, G. Baranes, B. Machielse, S. Grandi, D. Riedel, J. Borregaard, H. Park, M. Lon\v{c}ar, A. Suleymanzade, M. D. Lukin
https://arxiv.org/abs/2509.09464

Entanglement Assisted Non-local Optical Interferometry in a Quantum Network
The sensitivity of non-local optical measurements at low light intensities, such as those involved in long baseline telescope arrays, can be improved by using remote entanglement. Here, we demonstrate the use of entangled quantum memories in a quantum network of Silicon-vacancy centers in diamond nano-cavities to experimentally perform such non-local phase measurements. Specifically, we combine the generation of event-ready remote quantum entanglement, photon mode erasure that hides the "which-…

Steady-state entanglement of spin qubits mediated by non-reciprocal and chiral magnons
Martijn Dols, Mikhail Cherkasskii, Victor A. S. V. Bittencourt, Carlos Gonzalez-Ballestero, Durga B. R. Dasari, Silvia Viola Kusminskiy
https://arxiv.org/abs/2509.13094

Steady-state entanglement of spin qubits mediated by non-reciprocal and chiral magnons
We propose a hybrid quantum system in which a magnet supporting non-reciprocal magnons, chiral magnons, or both mediates the dissipative and unidirectional coupling of spin qubits. By driving the qubits, the steady state of this qubit-qubit coupling scheme becomes the maximally entangled Bell state. We devise a protocol where the system converges to this entangled state and benchmark it including qubit decay and dephasing. The protocol is numerically tested on a hybrid system consisting of nitr…

Swapped Entanglement in High-Dimensional Quantum Systems
S. M. Zangi, Chitra Shukla, Khalid Naseer, Saeed Haddadi
https://arxiv.org/abs/2508.00634 https://…

Swapped Entanglement in High-Dimensional Quantum Systems
Entanglement swapping is a fundamental protocol in quantum information processing that enables the distribution of entanglement between distant quantum systems. In this work, we first extend the concept of entanglement swapping to higher-dimensional quantum systems, specifically qudits. We then analyze the dynamics of entanglement swapping and quantify the average swapped entanglement in terms of concurrence and negativity. Our results demonstrate that higher-dimensional systems offer enhanced …

Matrix-product entanglement characterizing the optimality of state-preparation quantum circuits
Shuo Qi, Wen-Jun Li, Gang Su, Shi-Ju Ran
https://arxiv.org/abs/2507.05989

Matrix-product entanglement characterizing the optimality of state-preparation quantum circuits
Multipartite entanglement offers a powerful framework for understanding the complex collective phenomena in quantum many-body systems that are often beyond the description of conventional bipartite entanglement measures. Here, we propose a class of multipartite entanglement measures that incorporate the matrix product state (MPS) representation, enabling the characterization of the optimality of quantum circuits for state preparation. These measures are defined as the minimal distances from a t…

Certification of energy-restricted entanglement depth with simple measurements
Carles Roch I Carceller
https://arxiv.org/abs/2509.06726 https://arxiv.org/p…

Certification of energy-restricted entanglement depth with simple measurements
The ability to certify entanglement in multipartite scenarios is crucial for the development of quantum technologies, specially for the realization of large-scale networks. Here, we introduce a method to certify entanglement from sources with limited energy based on a state discrimination game played by multiple distant uncharacerized parties. Our approach is capable of detecting entanglement across all possible bipartitions employing a single, simple and separable measurement setting for all p…

Demonstration of a Logical Architecture Uniting Motion and In-Place Entanglement: Shor's Algorithm, Constant-Depth CNOT Ladder, and Many-Hypercube Code
Rich Rines, Benjamin Hall, Mariesa H. Teo, Joshua Viszlai, Daniel C. Cole, David Mason, Cameron Barker, Matt J. Bedalov, Matt Blakely, Tobias Bothwell, Caitlin Carnahan, Frederic T. Chong, Samuel Y. Eubanks, Brian Fields, Matthew Gillette, Palash Goiporia, Pranav Gokhale, Garrett T. Hickman, Marin Iliev, Eric B. Jones, Ryan A. Jones…

Demonstration of a Logical Architecture Uniting Motion and In-Place Entanglement: Shor's Algorithm, Constant-Depth CNOT Ladder, and Many-Hypercube Code
Logical qubits are considered an essential component for achieving utility-scale quantum computation. Multiple recent demonstrations of logical qubits on neutral atoms have relied on coherent qubit motion into entangling zones. However, this architecture requires motion prior to every entangling gate, incurring significant cost in wall clock runtime and motion-related error accumulation. We propose and experimentally realize an alternative architecture which unites qubit motion and in-place ent…

End-to-end entanglement of quantum network paths with multi-parameter states
Md Sohel Mondal, Aniket Zambare, Siddhartha Santra
https://arxiv.org/abs/2506.22245

End-to-end entanglement of quantum network paths with multi-parameter states
Long-range entanglement distribution in a quantum network relies on entanglement swapping at intermediate nodes along a network path to connect short-range entangled states established over the network edges. The end-to-end entanglement of a network path obtained via this process determines the utility of the network path for executing entanglement enabled tasks and for the design of entanglement routing protocols in the quantum network. Here, we study the end-to-end entanglement of paths in a …

Tailored First-order and Interior-point methods and a new semidefinite programming hierarchy for entanglement detection
Javier Pena, Vikesh Siddhu, Sridhar Tayur
https://arxiv.org/abs/2508.05854

Tailored First-order and Interior-point methods and a new semidefinite programming hierarchy for entanglement detection
Quantum entanglement lies at the heart of quantum information science, yet its reliable detection in high-dimensional or noisy systems remains a fundamental computational challenge. Semidefinite programming (SDP) hierarchies, such as the Doherty-Parrilo-Spedalieri (DPS) and Extension (EXT) hierarchies, offer complete methods for entanglement detection, but their practical use is limited by exponential growth in problem size. In this paper, we introduce a new SDP hierarchy, PST, that is sandwich…

Carrier-Assisted Entanglement Purification
Jaemin Kim, Karthik Mohan, Sung Won Yun, Joonwoo Bae
https://arxiv.org/abs/2509.07514 https://arxiv.org/pdf/2509…

Carrier-Assisted Entanglement Purification
Entanglement distillation, a fundamental building block of quantum networks, enables the purification of noisy entangled states shared among distant nodes by local operations and classical communication. Its practical realization presents several technical challenges, including the storage of quantum states in quantum memory and the execution of coherent quantum operations on multiple copies of states within the quantum memory. In this work, we present an entanglement purification protocol via …

Accurate and Scalable Simulation of Cavity-Based Networks in Modular Quantum Architectures
Sahar Ben Rached, Zezhou Sun, Guilu Long, Santiago Rodrigo, Carmen G. Almud\'ever, Eduard Alarc\'on, Sergi Abadal
https://arxiv.org/abs/2508.13896

Accurate and Scalable Simulation of Cavity-Based Networks in Modular Quantum Architectures
Cavity-mediated interconnects are a promising platform for scaling modular quantum computers by enabling high-fidelity inter-chip quantum state transmission and entanglement generation. In this work, we first model the dynamics of deterministic inter-chip quantum state transfer using the Stimulated Raman Adiabatic Passage (STIRAP) protocol, analyzing fidelity loss mechanisms under experimentally achievable qubit-cavity coupling and decoherence parameters. We then extend the NetSquid simulator, …

Replaced article(s) found for quant-ph. https://arxiv.org/list/quant-ph/new
[1/2]:
- Complete Genuine Multipartite Entanglement Monotone
Yu Guo
https://…