Tootfinder

Quantum computing stocks jumped after JPMorgan announced a $10B strategic tech investment; Arqit, D-Wave, Rigetti, and IonQ each rose about 20% (Jaures Yip/CNBC)
https://www.cnbc.com/2025/10/13/quantum-stocks-jpmorgan-investing-push.html

Quantum stocks surge after JPMorgan investing push into strategic tech
JPMorgan announced it would invest $10 billion in 27 specific industries, including quantum computing.

QBism and relational interpretation of quantum mechanics from the point of view of a contextual quantum realism (CQR)
Francois-Igor Pris
https://arxiv.org/abs/2510.09237 https:/…

QBism and relational interpretation of quantum mechanics from the point of view of a contextual quantum realism (CQR)
A realist interpretation of quantum mechanics is proposed - Contextual Quantum Realism (CQR) - according to which there exists a categorical distinction between the ideal (theory, observation instrument) and the real (quantum physical systems, properties), and, consequently, quantum ontology is context-sensitive. CQR is compared with QBism and Relational Quantum Mechanics (RQM), both of which also claim to offer realist interpretations. However, both approaches conflate the ideal and the real, …

Assessing the Impact of Post-Quantum Digital Signature Algorithms on Blockchains
Alison Gon\c{c}alves Schemitt (PUCRS), Henrique Fan da Silva (UNIPAMPA), Roben Castagna Lunardi (PUCRS, IFRS), Diego Kreutz (UNIPAMPA), Rodrigo Brand\~ao Mansilha (UNIPAMPA), Avelino Francisco Zorzo (PUCRS)
https://arxiv.org/abs/2510.09271

Assessing the Impact of Post-Quantum Digital Signature Algorithms on Blockchains
The advent of quantum computing threatens the security of traditional encryption algorithms, motivating the development of post-quantum cryptography (PQC). In 2024, the National Institute of Standards and Technology (NIST) standardized several PQC algorithms, marking an important milestone in the transition toward quantum-resistant security. Blockchain systems fundamentally rely on cryptographic primitives to guarantee data integrity and transaction authenticity. However, widely used algorithms…

Quantum Adams operations in quasimap K-theory
Shaoyun Bai, Jae Hee Lee
https://arxiv.org/abs/2510.09335 https://arxiv.org/pdf/2510.09335

Quantum Adams operations in quasimap K-theory
We define quantum deformations of Adams operations in $K$-theory, in the framework of quasimap quantum $K$-theory. They provide $K$-theoretic analogs of the quantum Steenrod operations from equivariant symplectic Gromov--Witten theory. We verify the compatibility of these operations with the Kahler and equivariant $q$-difference module structures, provide sample computations via $\mathbb{Z}/k$-equivariant localization, and identify them with $p$-curvature operators of the Kahler $q$-difference …

2026 means we're in the "risk-assessment" stage of a transition to post-quantum algorithms in the financial sector.

G7 Cyber Expert Group Statement on Advancing a Coordinated Roadmap for the Transition to Post-Quantum Cryptography in the Financial Sector: January 2026

Magnetic Materials for Quantum Magnonics
Rostyslav O. Serha, Carsten Dubs, Andrii V. Chumak
https://arxiv.org/abs/2510.09331 https://arxiv.org/pdf/2510.093…

Magnetic Materials for Quantum Magnonics
Quantum magnonics studies the quantum properties of magnons, the quanta of spin waves, and their application in quantum information processing. Progress in this field depends on identifying magnetic materials with characteristics tailored to the diverse requirements of magnonics and quantum magnonics. For single-magnon excitation, its control, hybrid coupling, and entanglement, the most critical property is the ability to support long magnon lifetimes. This perspective reviews established and e…

Simplified Quantum Weight Reduction with Optimal Bounds
Min-Hsiu Hsieh, Xingjian Li, Ting-Chun Lin
https://arxiv.org/abs/2510.09601 https://arxiv.org/pdf/2…

Simplified Quantum Weight Reduction with Optimal Bounds
Quantum weight reduction is the task of transforming a quantum code with large check weight into one with small check weight. Low-weight codes are essential for implementing quantum error correction on physical hardware, since high-weight measurements cannot be executed reliably. Weight reduction also serves as a critical theoretical tool, which may be relevant to the quantum PCP conjecture. We introduce a new procedure for quantum weight reduction that combines geometric insights with coning…

Yukawa interactions in Quantum Gravity
Gustavo P. de Brito, Manuel Reichert, Marc Schiffer
https://arxiv.org/abs/2510.09572 https://arxiv.org/pdf/2510.0957…

Yukawa interactions in Quantum Gravity
We present the first complete next-to-leading-order analysis of a Yukawa system within the framework of asymptotically safe quantum gravity. Our results are obtained through a systematic resummation of higher-order operators, revealing two distinct resummation mechanisms -- one of which has not been explored previously. In addition, we introduce a novel approach to estimate systematic uncertainties by simulating the impact of neglected higher-order contributions. We demonstrate that quantum g…

Quantum Trigonometric B\'ezier Curves
\c{C}etin Di\c{s}ib\"uy\"uk
https://arxiv.org/abs/2510.09336 https://arxiv.org/pdf/2510.09336

Quantum Trigonometric Bézier Curves
In order to construct quantum trigonometric Bézier curves with shape parameter, one parameter family of trigonometric Bernstein basis functions are introduced. We study the total positivity of the basis functions to analyze the shape preserving properties of the quantum trigonometric Bézier curves. We also showed that quantum trigonometric Bézier curves can be evaluated by two different recursive evaluation algorithms. Finally, we have defined rational counterpart of quantum trigonometric B�…

D-Wave Quantum agrees to acquire Quantum Circuits, a developer of error-corrected gate-model technology, for $550M, with $300M in stock and the rest in cash (Luke Kawa/Sherwood News)
https://sherwood.news/markets/d-wave-quantum-agrees-to…

D-Wave Quantum agrees to acquire Quantum Circuits for $550 million to boost gate-model development
D-Wave’s crashing the gate.

A quantum-coherent photon--emitter interface in the original telecom band
Marcus Albrechtsen, Severin Kr\"uger, Juan Loredo, Lucio Stefan, Zhe Liu, Yu Meng, Lukas L. Niekamp, Bianca F. Seyschab, Nikolai Spitzer, Richard J. Warburton, Peter Lodahl, Arne Ludwig, Leonardo Midolo
https://arxiv.org/abs/2510.09251

A quantum-coherent photon--emitter interface in the original telecom band
Quantum dots stand out as the most advanced and versatile light-matter interface available today. Their ability to deliver high-quality, high-rate, and pure photons has set benchmarks that far surpass other emitters. Yet, a critical frontier has remained elusive: achieving these exceptional capabilities at telecom wavelengths, bridging the gap to fiber-optic infrastructure and scalable silicon photonics. Overcoming this challenge demands high quality quantum materials and devices which, despite…

Towards Quantum Simulations of Sphaleron Dynamics at Colliders
Min Huang, Ying-Ying Li, Yandong Liu, Hao Zhang
https://arxiv.org/abs/2510.08910 https://arx…

Towards Quantum Simulations of Sphaleron Dynamics at Colliders
Sphaleron dynamics in the Standard Model at high-energy particle collisions remains experimentally unobserved, with theoretical predictions hindered by its nonperturbative real-time nature. In this work, we investigate a quantum simulation approach to this challenge. Taking the $1+1$D $O(3)$ model as a protocol towards studying dynamics of sphaleron in the electroweak theory, we identify the sphaleron configuration and establish lattice parameters that reproduce continuum sphaleron energies wit…

Statistical Benchmarking of Optimization Methods for Variational Quantum Eigensolver under Quantum Noise
Silvie Ill\'esov\'a, Tom\'a\v{s} Bezd\v{e}k, Vojt\v{e}ch Nov\'ak, Bruno Senjean, Martin Beseda
https://arxiv.org/abs/2510.08727

Statistical Benchmarking of Optimization Methods for Variational Quantum Eigensolver under Quantum Noise
This work investigates the performance of numerical optimization algorithms applied to the State-Averaged Orbital-Optimized Variational Quantum Eigensolver for the H2 molecule under various quantum noise conditions. The goal is to assess the stability, accuracy, and computational efficiency of commonly used gradient-based, gradient-free, and global optimization strategies within the Noisy Intermediate-Scale Quantum regime. We systematically compare six representative optimizers, BFGS, SLSQP, Ne…

The Enduring Dominance of Deep Neural Networks: A Critical Analysis of the Fundamental Limitations of Quantum Machine Learning and Spiking Neural Networks
Takehiro Ishikawa
https://arxiv.org/abs/2510.08591

The Enduring Dominance of Deep Neural Networks: A Critical Analysis of the Fundamental Limitations of Quantum Machine Learning and Spiking Neural Networks
Recent advancements in QML and SNNs have generated considerable excitement, promising exponential speedups and brain-like energy efficiency to revolutionize AI. However, this paper argues that they are unlikely to displace DNNs in the near term. QML struggles with adapting backpropagation due to unitary constraints, measurement-induced state collapse, barren plateaus, and high measurement overheads, exacerbated by the limitations of current noisy intermediate-scale quantum hardware, overfitting…

Post-Quantum Security of Block Cipher Constructions
Gorjan Alagic, Chen Bai, Christian Majenz, Kaiyan Shi
https://arxiv.org/abs/2510.08725 https://arxiv.or…

Post-Quantum Security of Block Cipher Constructions
Block ciphers are versatile cryptographic ingredients that are used in a wide range of applications ranging from secure Internet communications to disk encryption. While post-quantum security of public-key cryptography has received significant attention, the case of symmetric-key cryptography (and block ciphers in particular) remains a largely unexplored topic. In this work, we set the foundations for a theory of post-quantum security for block ciphers and associated constructions. Leveraging o…

In the second of two episodes to mark the centenary of quantum physics,
we hear how the boundary between the quantum and classical worlds causes huge inconsistencies
—and a debate about the nature of reality itself.
Our guest today,
Vlatko Vedr,
explains his radical vision for fixing those problems and building a consistent understanding of the universe

Parametric Drive of a Double Quantum Dot in a Cavity
L. Jarjat, B. Hue, T. Philippe-Kagan, B. Neukelmance, J. Craquelin, A. Th\'ery, C. Fruy, G. Abulizi, J. Becdelievre, M. M. Desjardins, T. Kontos, M. R. Delbecq
https://arxiv.org/abs/2510.09120

Parametric Drive of a Double Quantum Dot in a Cavity
We demonstrate the parametric modulation of a double quantum dot charge dipole coupled to a cavity, at the cavity frequency, achieving an amplified readout signal compared to conventional dispersive protocols. Our findings show that the observed cavity field displacement originates from dipole radiation within the cavity, rather than from a longitudinal coupling mechanism, yet exhibits the same signatures while relying on a transverse coupling. By carefully tuning the phase and amplitude of the…

Crystal-Field--Driven Magnetoelectricity in the Triangular Quantum Magnet CeMgAl$_{11}$O$_{19}$
Sonu Kumar (Charles University, Faculty of Mathematics and Physics, Department of Condensed Matter Physics, Prague, Czech Republic, Adam Mickiewicz University, Faculty of Physics and Astronomy, Department of Experimental Physics of Condensed Phase, Pozna\'n, Poland), Ga\"el Bastien (Charles University, Faculty of Mathematics and Physics, Department of Condensed Matter Physics, Pragu…

Crystal-Field--Driven Magnetoelectricity in the Triangular Quantum Magnet CeMgAl$_{11}$O$_{19}$
We report dielectric and magnetoelectric studies of single-crystalline \ce{CeMgAl11O19}, a Kramers triangular magnet embedded in a polarizable hexaaluminate lattice. In zero magnetic field, the permittivity $\varepsilon'(T)$ follows the Barrett law of a quantum paraelectric down to 25 K, below which a broad minimum develops near 3 K without evidence of static ferroelectric or magnetic order. Application of magnetic fields up to \SI{9}{\tesla} shifts this minimum to higher temperatures and broad…

Quantum fluctuation-induced first-order breaking of time-reversal symmetry in unconventional superconductors
Yin Shi
https://arxiv.org/abs/2510.09234 https://

Quantum fluctuation-induced first-order breaking of time-reversal symmetry in unconventional superconductors
Spontaneous time-reversal symmetry breaking in superconductors with competing non-degenerate pairing channels is an exotic quantum phase transition that could give rise to robust topological superconductivity and unusual magnetism. It is proposed mostly in two-dimensional systems and is signaled by a nonzero relative phase between the two superconducting order parameters, hence it should particularly be prone to order-parameter phase fluctuations. Nevertheless, the existing understanding of it …

Evaluating Multiconfigurational Trials for Accurate Phaseless Auxiliary-Field Quantum Monte Carlo on 3d Transition Metal Complexes
Hung T. Vuong, Ankit Mahajan, John L. Weber, James Shee, David R. Reichman, Richard A. Friesner
https://arxiv.org/abs/2510.09532

Evaluating Multiconfigurational Trials for Accurate Phaseless Auxiliary-Field Quantum Monte Carlo on 3d Transition Metal Complexes
In this study, we evaluate multi-configurational trial wave function protocols for phaseless auxiliary field quantum Monte Carlo (ph-AFQMC) on transition metal containing systems. First, we benchmark vertical ionization potentials for 22 3d transition metal complexes against published high-accuracy ph-AFQMC values in a double zeta basis set. We then compute the vertical ionization potential for a set of six metallocenes using our best-performing protocol, alongside ph-AFQMC using a configuratio…

Mathematical basis, phase transitions and singularities of (3 1)-dimensional phi4 scalar field model
Zhidong Zhang
https://arxiv.org/abs/2511.07439 https://arxiv.org/pdf/2511.07439 https://arxiv.org/html/2511.07439
arXiv:2511.07439v1 Announce Type: new
Abstract: The lambda phi4 scalar field model that can be applied to interpret pion-pion scattering and properties of hadrons. In this work, the mathematical basis, phase transitions and singularities of a (3 1)-dimensional (i.e., (3 1)D) phi4 scalar field model are investigated. It is found that as a specific example of topological quantum field theories, the (3 1)D phi4 scalar field model must be set up on the Jordan-von Neumann-Wigner framework and dealt with the parameter space of complex time (or complex temperature). The use of the time average and the topologic Lorentz transformation representing Reidemeister moves ensure the integrability, which takes into account for the contributions of nontrivial topological structures to physical properties of the many-body interacting system. The ergodic hypothesis is violated at finite temperatures in the (3 1)D phi4 scalar field model. Because the quantum field theories with ultraviolet cutoff can be mapped to the models in statistical mechanics, the (3 1)D phi4 scalar field model with ultraviolet cutoff is studied by inspecting its relation with the three-dimensional (3D) Ising model. Furthermore, the direct relation between the coupling K in the 3D Ising model and the bare coupling lambda0 in the (3 1)D phi4 scalar field model is determined in the strong coupling limit. The results obtained in the present work can be utilized to investigate thermodynamic physical properties and critical phenomena of quantum (scalar) field theories.
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Nonlocal Games Through Communication Complexity and Quantum Cryptography
Pierre Botteron
https://arxiv.org/abs/2510.09457 https://arxiv.org/pdf/2510.09457

Nonlocal Games Through Communication Complexity and Quantum Cryptography
This thesis explores foundational aspects of quantum information theory and quantum cryptography. First, we investigate quantum correlations in interactive settings, including the CHSH and graph isomorphism games. We aim to distinguish quantum correlations from non-signaling correlations by leveraging the principle of communication complexity. To this end, we employ techniques such as distributed computation, majority-function-based distillation protocols, the algebraic and geometric properti…

A look at claims from Google and others about quantum computing breakthroughs over the past few months that helped boost quantum computing stocks in 2025 (Richard Waters/Financial Times)

Unveiling dynamical quantum error correcting codes via non-invertible symmetries
Rajath Radhakrishnan, Adar Sharon, Nathanan Tantivasadakarn
https://arxiv.org/abs/2510.09565 htt…

Unveiling dynamical quantum error correcting codes via non-invertible symmetries
Dynamical stabilizer codes (DSCs) have recently emerged as a powerful generalization of static stabilizer codes for quantum error correction, replacing a fixed stabilizer group with a sequence of non-commuting measurements. This dynamical structure unlocks new possibilities for fault tolerance but also introduces new challenges, as errors must now be tracked across both space and time. In this work, we provide a physical and topological understanding of DSCs by establishing a correspondence bet…

Certifying Quantum Gates via Automata Advantage
Anna Schroeder, Lucas B. Vieira, Jan N\"oller, Nikolai Miklin, Mariami Gachechiladze
https://arxiv.org/abs/2510.09575 https:…

Certifying Quantum Gates via Automata Advantage
There is growing interest in developing rigorous tests of quantumness that are feasible even before practical quantum advantages become a reality. Such tests not only aim to certify the quantum nature of a system but also serve as benchmarks for precise quantum control. In this work, we argue that promise problems, studied in the theory of finite automata, provide a natural framework for designing sound tests of quantum gate quality. Soundness, the property that only implementations of sufficie…

Hidden integer quantum ferroelectricity in chiral Tellurium
Wei Luo, Sihan Deng, Muting Xie, Junyi Ji, Hongjun Xiang, Laurent Bellaiche
https://arxiv.org/abs/2510.08897 https://…

Hidden integer quantum ferroelectricity in chiral Tellurium
Ferroelectricity is a cornerstone of functional materials research, enabling diverse technologies from non-volatile memory to optoelectronics. Recently, type-I integer quantum ferroelectricity (IQFE), unconstrained by symmetry, has been proposed and experimentally demonstrated; however, as it arises from ionic displacements of an integer lattice vector, the initial and final states are macroscopically indistinguishable, rendering the physical properties unchanged. Here, we propose for the first…

Replaced article(s) found for math.QA. https://arxiv.org/list/math.QA/new
[1/1]:
- $\hbar$-Vertex algebras and chiralization of star products
Simone Castellan
h…

A one-world interpretation of quantum mechanics
Isaac Layton, Jonathan Oppenheim, Zachary Weller-Davies
https://arxiv.org/abs/2510.09149 https://arxiv.org/…

A one-world interpretation of quantum mechanics
The measurement problem is the issue of explaining how the objective classical world emerges from a quantum one. Here we take a different approach. We assume that there is an objective classical system, and then ask that the standard rules of probability theory apply to it when it interacts with a quantum system. Under mild assumptions, we recover the unitary dynamics, collapse and Born rule postulates from quantum theory. Nonetheless, there is no decoherence, because the quantum state remains …

I'm really starting to love Typst! It's so much easier than LaTeX and it compiles instantly.
Writing stuff in it is so much faster compared to LaTeX that I've started using it for my homework exercises (which I don't have the patience for with LaTeX).
The scripting language is really nice and there are a lot of packages you can use. I'm using physica to get braket notation and quill to be able to draw quantum circuit diagrams for example. Yesterday, I used the…

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[2/2]:
- Model-independent cosmological inference after the DESI DR2 data with improved inverse distance l...
Jia-Le Ling, Guo-Hong Du, Tian-Nuo Li, Jing-Fei Zhang, Shao-Jiang Wang, Xin Zhang

High-Fidelity Single-Shot Readout and Selective Nuclear Spin Control for a Spin-1/2 Quantum Register in Diamond
Prithvi Gundlapalli, Philipp J. Vetter, Genko Genov, Michael Olney-Fraser, Peng Wang, Matthias M. M\"uller, Katharina Senkalla, Fedor Jelezko
https://arxiv.org/abs/2510.09164

High-Fidelity Single-Shot Readout and Selective Nuclear Spin Control for a Spin-1/2 Quantum Register in Diamond
Quantum networks offer a way to overcome the size and complexity limitations of single quantum devices by linking multiple nodes into a scalable architecture. Group-IV color centers in diamond, paired with long-lived nuclear spins, have emerged as promising building blocks demonstrating proof-of-concept experiments such as blind quantum computing and quantum-enhanced sensing. However, realizing a large-scale electro-nuclear register remains a major challenge. Here we establish the germanium-vac…

@… and
@… might like this.
I think this is interesting, from "Frontiers in Neuroscience" mag. New "HYPOTHESIS AND THEORY article" by Joachim Keppler, head of Department of Consciousness …

Frontiers | Macroscopic quantum effects in the brain: new insights into the fundamental principle underlying conscious processes
Empirical findings indicate that conscious states are inextricably linked to long-range synchronized activity patterns that result from phase transitions and...

Replaced article(s) found for cs.IT. https://arxiv.org/list/cs.IT/new
[1/1]:
- On the Capacity of Vector Linear Computation over a Noiseless Quantum Multiple Access Channel wit...
Yuhang Yao, Syed A. Jafar

Replaced article(s) found for cond-mat.quant-gas. https://arxiv.org/list/cond-mat.quant-gas/new
[1/1]:
- Observation of the Einstein-de Haas Effect in a Bose-Einstein condensate
Matsui, Miyazawa, Goto, Nakano, Kawaguchi, Ueda, Kozuma

Kind of love this professor’s introduction to quantum mechanics:
#teaching

Quantum Channel Masking
Anna Honeycutt, Hailey Murray, Eric Chitambar
https://arxiv.org/abs/2510.09456 https://arxiv.org/pdf/2510.09456

Quantum Channel Masking
Quantum masking is a special type of secret sharing in which some information gets reversibly distributed into a multipartite system, leaving the original information inaccessible to each subsystem. This paper proposes a dynamical extension of quantum masking to the level of quantum channels. In channel masking, the identity of a channel becomes locally hidden but still globally accessible after its output is sent through a bipartite broadcasting channel. We first characterize all families of d…

Metaplectic time-frequency representations
Gianluca Giacchi
https://arxiv.org/abs/2510.09322 https://arxiv.org/pdf/2510.09322

Metaplectic time-frequency representations
Time-frequency representations stemmed in 1932 with the introduction of the Wigner distribution. For most of the 20th century, research in this area primarily focused on defining joint probability distributions for position and momentum in quantum mechanics. Applications to electrical engineering were soon established with the seminal works of Gabor and the researchers at Bell Labs. In 2012, Bai, Li and Cheng used for the first time metaplectic operators, defined in the middle of 20th century b…

Crosslisted article(s) found for cond-mat.dis-nn. https://arxiv.org/list/cond-mat.dis-nn/new
[1/1]:
- Fractal structure of multipartite entanglement in monitored quantum circuits
Vaibhav Sharma, Erich J Mueller

Crosslisted article(s) found for math.SG. https://arxiv.org/list/math.SG/new
[1/1]:
- Quantum Adams operations in quasimap K-theory
Shaoyun Bai, Jae Hee Lee
htt…

The foundational value of quantum computing for classical fluids
Sauro Succi, Claudio Sanavio, Peter Love
https://arxiv.org/abs/2510.09178 https://arxiv.or…

The foundational value of quantum computing for classical fluids
Quantum algorithms for classical physics problems expose new patterns of quantum information flow as compared to the many-body Schrödinger equation. As a result, besides their potential practical applications, they also offer a valuable theoretical and computational framework to elucidate the foundations of quantum mechanics, particularly the validity of the many-body Schrödinger equation in the limit of large number of particles, on the order of the Avogadro number. This idea is illustrated …

Acousto-optic lens for 3D shuttling of atoms in a neutral atom quantum computer
Zhichao Guo, Rik A. H. van Herk, Edgar J. D. Vredenbregt, Servaas J. J. M. F. Kokkelmans
https://arxiv.org/abs/2510.09398

Mapping the moir\'e potential in multi-layer rhombohedral graphene
Eric Seewald, Sanat Ghosh, Nishchhal Verma, John Cenker, Yinan Dong, Birui Yang, Amit Basu, Takashi Taniguchi, Kenji Watanabe, Mandar M. Deshmukh, Dmitri N. Basov, Raquel Queiroz, Cory Dean, Abhay N. Pasupathy
https://arxiv.org/abs/2510.09548

Mapping the moiré potential in multi-layer rhombohedral graphene
Rhombohedral graphene (rG) aligned with hexagonal boron nitride (hBN) has been shown to host flat bands that stabilize various strongly correlated quantum phases, including Mott insulators, integer, and fractional quantum anomalous Hall phases. In this work, we use scanning tunneling microscopy/spectroscopy (STM/STS) to visualize the dispersion of flat bands with doping and applied displacement fields in a hBN-aligned rhombohedral trilayer graphene (rtG)/hBN moiré superlattice. In addition to …

Cambridge, UK-based Nu Quantum, which builds networking infrastructure to link and scale quantum computers, raised a $60M Series A led by National Grid Partners (Isabella Ward/Bloomberg)
https://www.bloomberg.com/news/articles/20

I think the best summary until now about Post-quantum cryptography is from Peter Gutmann in the cryptography mailing-list.

Given that after 20 years and hundreds of millions of dollars spent researchers have yet to demonstrate a single legitimate cryptanalysis result using a quantum physics experiment, it's a bit like arguing over which brand of unicorn repellent is the most cromulent.

The current state of things in terms of pure vs. hybrid systems seems to be:

- …

A Framework for Distributed Resource Allocation in Quantum Networks
Nitish K. Panigrahy, Leonardo Bacciottini, C. V. Hollot, Emily A. Van Milligen, Matheus Guedes de Andrade, Nageswara S. V. Rao, Gayane Vardoyan, Don Towsley
https://arxiv.org/abs/2510.09371

A Framework for Distributed Resource Allocation in Quantum Networks
We introduce a distributed resource allocation framework for the Quantum Internet that relies on feedback-based, fully decentralized coordination to serve multiple co-existing applications. We develop quantum network control algorithms under the mathematical framework of Quantum Network Utility Maximization (QNUM), where utility functions quantify network performance by mapping entanglement rate and quality into a joint optimization objective. We then introduce QPrimal-Dual, a decentralized, sc…

# Quantum physics reveals there is no such thing as things
There is no such thing as individuality in the quantum realm
Olimpia Lombardi
https://iai.tv/articles/quantum-physics-reveals-there-is-no-such-thing-as-things-auid-3267

Gate Teleportation vs Circuit Cutting in Distributed Quantum Computing
Shobhit Gupta, Nikolay Sheshko, Daniel J. Dilley, Alvin Gonzales, Manish K. Singh, Zain H. Saleem
https://arxiv.org/abs/2510.08894

Gate Teleportation vs Circuit Cutting in Distributed Quantum Computing
Distributing circuits across quantum processor modules will enable the execution of circuits larger than the qubit count limitations of monolithic processors. While distributed quantum computation has primarily utilized circuit cutting, it incurs an exponential growth of sub-circuit sampling and classical post-processing overhead with an increasing number of cuts. The entanglement-based gate teleportation approach does not inherently incur exponential sampling overhead, provided that quantum in…

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/2]:
- Non-spherical effects on the mass function of Primordial Black Holes
Albert Escriv\`a, Chul-Moon Yoo

High-Throughput Screening of Transition Metal-Based 2D Multilayer Kagome Materials via the "1 3" Design Strategy
Xing-Yu Wang, En-Qi Bao, Su-Yang Shen, Jun-Hui Yuan, Jiafu Wang
https://arxiv.org/abs/2510.08903

High-Throughput Screening of Transition Metal-Based 2D Multilayer Kagome Materials via the "1 + 3" Design Strategy
Two-dimensional (2D) kagome materials have drawn extensive research interest due to their unique electronic properties, like flat bands, magnetic frustration, and topological quantum states, which enable precise quantum state control and novel device innovation. Yet, simultaneously achieving high stability, tunability, and multifunctionality in 2D kagome systems remains a key material design challenge. In this study, we innovatively propose a new paradigm for constructing two-dimensional multi-…

A look at Rigetti Computing and D-Wave Quantum, whose shares have surged over 1,900% in the past year as the potential of quantum computing captivates investors (Felice Maranz/Bloomberg)
https://www.bloomberg.com/news/articles/20

Entangled Photon Pair Generator via Biexciton-Exciton Cascade in Semiconductor Quantum Dots and its Simulation
Simon Sekav\v{c}nik, Paul Kohl, Janis N\"otzel
https://arxiv.org/abs/2510.09262

Entangled Photon Pair Generator via Biexciton-Exciton Cascade in Semiconductor Quantum Dots and its Simulation
The generation of entangled photon pairs is highly useful for many types of quantum technologies. In this work an entangled photon pair generator that utilises the biexciton-exciton cascade in semiconductor quantum dots is described on a physical, mathematical, and software level. The system is implemented and simulated as a self-contained component in a framework for bigger quantum optical experiments. Thus, it is a description to further the holistic understanding of the system for interdisci…

Revealing signals of higher-order nonlinear showers in particle-laser collisions
T. G. Blackburn, B. King, M. Samuelsson
https://arxiv.org/abs/2510.08679 https://

Revealing signals of higher-order nonlinear showers in particle-laser collisions
Several high power laser facilities are reaching field strengths where leading order strong-field quantum electrodynamical (QED) processes can be measured in the non-perturbative regime for the first time. At very high, as yet unobtainable in the laboratory, field strengths, the contribution of higher-order processes is predicted to dominate, implying a breakdown of current calculational methods. Focusing on nonlinear showers and considering currently available experimental parameters, we find …

[2025-10-13 Mon (UTC), 2 new articles found for math.QA Quantum Algebra]
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Crosslisted article(s) found for cond-mat.quant-gas. https://arxiv.org/list/cond-mat.quant-gas/new
[1/1]:
- Superconductivity in the repulsive Hubbard model on different geometries induced by density-assis...
Franco T. Lisandrini, Edmond Orignac, Roberta Citro, Ameneh S…

Horizon Quantum, which aims to list on Nasdaq via a SPAC in Q1 2026, claims it is the first private company to deploy a commercial quantum computer in Singapore (Dylan Butts/CNBC)
https://www.cnbc.com/2025/12/04/horizon-qu

Software startup deploys Singapore’s first quantum computer for commercial use
Singapore-based software firm Horizon Quantum Computing has become the first private firm to deploy a quantum computer for commercial use in the city-state.

Seventeen years after the Large Hadron Collider switched on,
particle physicists are realizing that they can use the collider to explore how information flows through quantum systems
— a question at the foundations of quantum computing.
The two possible spins of the quarks correspond to the 0 and 1 states of a qubit,
a unit of quantum information.
“It is treating the process of colliding things together and forming new particles as a quantum processor,”
s…

Particle Physicists Detect ‘Magic’ at the Large Hadron Collider | Quanta Magazine
The supercollider is now being used to explore quantum phenomena, including a “magic” form of quantum entanglement.

Universal syndrome-based recovery for noise-adapted quantum error correction
Debjyoti Biswas, Prabha Mandayam
https://arxiv.org/abs/2510.08719 https://arxi…

Universal syndrome-based recovery for noise-adapted quantum error correction
Quantum error correction (QEC) is an essential tool for quantum computing that enables reliable information processing in the presence of noise. Syndrome measurements play a central role in QEC, making it possible to unambiguously identify the location and type of errors. While syndrome extraction is natural for conventional QEC protocols, where the errors satisfy certain algebraic constraints \emph{perfectly}, this feature is largely missing in the framework of approximate or noise-adapted QEC…

Crosslisted article(s) found for cond-mat.dis-nn. https://arxiv.org/list/cond-mat.dis-nn/new
[1/1]:
- Superconductivity in the two-dimensional Hubbard model revealed by neural quantum states
Christopher Roth, Ao Chen, Anirvan Sengupta, Antoine Georges

JPMorgan Chase launches a decade-long plan to invest $10B in industries critical for national security, including "frontier" tech like AI and quantum computing (Hugh Son/CNBC)
https://www.cnbc.com/2025/10/13/jpmorgan-chase-to-invest-10-…

JPMorgan Chase says it will invest $10 billion into industries critical for national security
The move helps JPMorgan Chase organize its activities around national interests at a time of heightened tensions between the U.S. and China.

Quantization of charged fields in the presence of intense electromagnetic fields
\'Alvaro \'Alvarez-Dom\'inguez
https://arxiv.org/abs/2510.09447 https://

Quantization of charged fields in the presence of intense electromagnetic fields
This thesis applies techniques from quantum field theory in curved spacetimes to study particle creation in external fields, focusing on the Schwinger effect (i.e., the production of particle-antiparticle pairs by intense electric fields). Although experimental verification remains out of reach, theoretical analysis advances our understanding of this phenomenon and its broader implications. The work develops the theoretical framework for quantizing charged fields in nontrivial backgrounds, ad…

Nonlinear Heisenberg Limit via Uncertainty Principle in Quantum Metrology
Binke Xia, Jingzheng Huang, Yuxiang Yang, Guihua Zeng
https://arxiv.org/abs/2510.09216 https://

Nonlinear Heisenberg Limit via Uncertainty Principle in Quantum Metrology
The Heisenberg limit is acknowledged as the ultimate precision limit in quantum metrology, traditionally implying that root mean square errors of parameter estimation decrease linearly with the time T of evolution and the number N of quantum gates or probes. However, this conventional perspective fails to interpret recent studies of "super-Heisenberg" scaling, where precision improves faster than linearly with T and N. In this work, we revisit the Heisenberg scaling by leveraging the position-m…

Crosslisted article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- Regular black holes in isothermal cavity
Athanasios G. Tzikas
https://

Skyrmionic polarization textures in structured dielectric planar media
Francesco Di Colandrea, Lorenzo Marrucci, Filippo Cardano
https://arxiv.org/abs/2510.09427 https://…

Skyrmionic polarization textures in structured dielectric planar media
Skyrmionic patterns of optical fields have recently emerged across diverse photonic platforms. Here, we show that such textures also arise in the polarization eigenstates of light propagation through flat dielectric devices with an engineered, space-dependent optic-axis orientation. We focus on two-dimensional periodic structures, where propagation through multiple devices maps onto quantum dynamics on a synthetic optical lattice. Adopting the condensed-matter framework, a spatial period define…

Incoherent Imaging with Spatially Structured Quantum Probes
Anthony J. Brady, Zihao Gong, Alexey V. Gorshkov, Saikat Guha
https://arxiv.org/abs/2510.09521 https://

Incoherent Imaging with Spatially Structured Quantum Probes
Incoherent imaging, including fluorescence and absorption microscopy, is often limited by weak signals and resolution constraints -- notoriously, Rayleigh's curse. We investigate how spatially structured quantum probes, combined with quantum detection strategies like spatial mode demultiplexing and photon counting, overcome these limitations. We propose a novel imaging protocol based on twin-beam echoes that maps the generalized incoherent-imaging model -- comprising both absorption and fluores…

Partial Self-Correction in Layer Codes
Dominic J. Williamson
https://arxiv.org/abs/2510.09218 https://arxiv.org/pdf/2510.09218

Partial Self-Correction in Layer Codes
The storage of large-scale quantum information at finite temperature requires an autonomous and reliable quantum hard drive, also known as a self-correcting quantum memory. It is a long-standing open problem to find a self-correcting quantum memory in three dimensions. The recently introduced Layer Codes achieve the best possible scaling of code parameters and logical energy barrier in three dimensions, these are tantalizing features for the purposes of self-correction. In this work we show tha…

Vancouver-based quantum computing startup Photonic raised CA$180M led by Planet First Partners, bringing its total funding to CA$375M (Madison McLauchlan/BetaKit)
https://betakit.com/photonic-says-its-ready-to-commercialize-quantum-with-180-mi…

Crosslisted article(s) found for physics.atom-ph. https://arxiv.org/list/physics.atom-ph/new
[1/1]:
- Quantum Calculations of the Cavity Shift in Electron Magnetic Moment Measurements
Hannah Day, Roni Harnik, Yonatan Kahn, Shashin Pavaskar, Kevin Zhou

Two-Photon Induced Coherence without Induced Emission
Dong-Gil Im, Seung-Yeun Yoo, Chung-Hyun Lee, Jongheon Suh, Yoon-Ho Kim
https://arxiv.org/abs/2510.09392 https://

Two-Photon Induced Coherence without Induced Emission
At the heart of recent advances in quantum imaging and spectroscopy with undetected photons is the quantum optical effect known as induced coherence without induced emission. This quantum interference effect has enabled access to challenging wavelength regimes for imaging and spectroscopic applications. However, the potential of undetected photon quantum metrology, particularly the enhanced phase sensitivity offered by Fock or N00N states, has not yet been realized, as prior work focused only o…

If you:
🔸create an entangled pair of particles,
🔸and then separate them by a very large distance,
🔸and then measure the quantum state of one of them,
🔹the quantum state of the other one is all-of-a-sudden determined,
-- not at the speed of light, but rather instantaneously.
This has now been demonstrated across distances of hundreds of kilometers over time intervals of under 100 nanoseconds.
If information is being transmitted between these two entangled…

Quantum entanglement wins 2022's Nobel Prize in physics
They say that nobody understands quantum mechanics. But thanks to these three pioneers in quantum entanglement, perhaps we do.

Acoustoelectric Amplification in a Piezoelectric-2DEG Heterostructure
Eric Chatterjee, Daniel Soh, Matt Eichenfield
https://arxiv.org/abs/2510.09248 https://

Acoustoelectric Amplification in a Piezoelectric-2DEG Heterostructure
We provide a quantum mechanical description of phonon amplification in a heterostructure consisting of a two-dimensional electron gas (2DEG) stacked on top of a piezoelectric material. An applied drift voltage effectively creates a population inversion in the momentum states of the 2DEG electrons, giving rise to spontaneous emission of phonons. Once an acoustic wave is launched, the pumped electrons release phonons via stimulated emission, returning to depleted ground states before being pumped…

[2025-10-13 Mon (UTC), no new articles found for cond-mat.quant-gas Quantum Gases]
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Strong coupling of collective optical resonances in dielectric metasurfaces
Izzatjon Allayarov, Vittorio Aita, Diane J. Roth, Boaz van Casteren, Anton Yu. Bykov, Andrey B. Evlyukhin, Anatoly V. Zayats, Antonio Cal\`a Lesina
https://arxiv.org/abs/2510.09117

Strong coupling of collective optical resonances in dielectric metasurfaces
Dielectric metasurfaces can achieve strong light-matter interaction based on several types of collective (nonlocal) resonances, such as surface lattice resonances (SLRs) and quasi bound states in the continuum (quasi-BICs). Spectral selectivity, field enhancement, and high and controllable Q-factors make these resonances appealing for technological applications in lasing, sensing, nonlinear optics, and quantum photon sources. An emerging challenge focuses on tailoring light-matter interaction v…

Quantum Reference Frames in Arbitrary Charge Sectors: Accessibility of Global Properties from Internal Perspectives
Anne-Catherine de la Hamette, Viktoria Kabel, \v{C}aslav Brukner
https://arxiv.org/abs/2510.09100

Quantum Reference Frames in Arbitrary Charge Sectors: Accessibility of Global Properties from Internal Perspectives
A fundamental question in the field of quantum reference frames concerns what global properties of a system can be determined by observers operating entirely from within that system. We investigate this question by extending both the perspectival and perspective-neutral approaches beyond the commonly studied zero total momentum case to arbitrary fixed charge sectors. When the entire system, including the reference frames, moves at a fixed total momentum $P$ relative to an external frame, this g…

[2025-10-13 Mon (UTC), 9 new articles found for gr-qc General Relativity and Quantum Cosmology]
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Theory of non-resonant Raman scattering from electrons in nodal and flat bands
Predrag Nikoli\'c
https://arxiv.org/abs/2510.08690 https://arxiv.org/pdf…

Theory of non-resonant Raman scattering from electrons in nodal and flat bands
Raman scattering is emerging as a surprising probe of electron topology in quantum materials. It has been used recently to detect and characterize a topological phase transition that accompanies the magnetic transition in Nd$_2$Ir$_2$O$_7$. Here we present a theory of Raman scattering from nodal electrons with Weyl and quadratic band touching spectra, which has to reach beyond the standard effective mass approximation. After reviewing and providing the details of our previous theory development…

A Decoy-like Protocol for Quantum Key Distribution: Enhancing the Performance with Imperfect Single Photon Sources
Chanaprom Cholsuk, Furkan A\u{g}larc{\i}, Daniel K. L. Oi, Serkan Ate\c{s}, Tobias Vogl
https://arxiv.org/abs/2510.09454

A Decoy-like Protocol for Quantum Key Distribution: Enhancing the Performance with Imperfect Single Photon Sources
Quantum key distribution (QKD) relies on single photon sources (SPSs), e.g. from solid-state systems, as flying qubits, where security strongly requires sub-Poissonian photon statistics with low second-order correlation values (\$g^{(2)}(0)\$). However, achieving such low \$g^{(2)}(0)\$ remains experimentally challenging. We therefore propose a decoy-like QKD protocol that relaxes this constraint while maintaining security. This enables the use of many SPSs with \$g^{(2)}(0) > \$0.1, routinely …

Structure of quantum measurements implementable with one round of classical communication
Arthur C. R. Dutra, Ties-A. Ohst, Hai-Chau Nguyen, Otfried G\"uhne
https://arxiv.org/abs/2510.09381

Structure of quantum measurements implementable with one round of classical communication
Measurements that can be implemented via local operations and classical communication (LOCC) constitute a class of operations that is available in future quantum networks in which parties share entangled resource states. We characterise the different classes of measurements implementable with LOCC, where communication is restricted to a single round with a fixed direction. In particular, using the framework of constrained separability problems, we provide a complete characterisation of the clas…

Replaced article(s) found for physics.atom-ph. https://arxiv.org/list/physics.atom-ph/new
[1/1]:
- Demonstration and frequency noise characterization of a 17 $\mu$m quantum cascade laser
M Manceau, T E Wall, H Philip, A N Baranov, Olivier Lopez, M R Tarbutt, R Teissier, B …

Non-Hermitian Bethe-Salpeter Equation for Open Systems: Emergence of Exceptional Points in Excitonic Spectra from First Principles
Zhenlin Zhang, Wei Hu, Enrico Perfetto, Gianluca Stefanucci
https://arxiv.org/abs/2510.09386

Non-Hermitian Bethe-Salpeter Equation for Open Systems: Emergence of Exceptional Points in Excitonic Spectra from First Principles
In open quantum systems hosting excitons, dissipation mechanisms critically shape the excitonic dynamics, band-structure and topological properties. A microscopic understanding of excitons in such non-Hermitian settings demands a first-principles generalization of the Bethe-Salpeter equation (BSE). Building on a recently introduced nonequilibrium Green's function formalism compatible with Lindbladian dynamics, we derive a non-Hermitian BSE from diagrammatic perturbation theory on the Keldysh co…

Fast CZ Gate via Energy-Level Engineering in Superconducting Qubits with a Tunable Coupler
Benzheng Yuan, Chaojie Zhang, Chuanbing Han, Shuya Wang, Peng Xu, Huihui Sun, Qing Mu, Lixin Wang, Bo Zhao, Weilong Wang, Zheng Shan
https://arxiv.org/abs/2510.09461

Fast CZ Gate via Energy-Level Engineering in Superconducting Qubits with a Tunable Coupler
In superconducting quantum circuits, decoherence errors in qubits constitute a critical factor limiting quantum gate performance. To mitigate decoherence-induced gate infidelity, rapid implementation of quantum gates is essential. Here we propose a scheme for rapid controlled-Z (CZ) gate implementation through energy-level engineering, which leverages Rabi oscillations between the |11> state and the superposition state in a tunable-coupler architecture. Numerical simulations achieved a 17 …

Chaos of charged particles near a renormalized group improved Kerr black hole in an external magnetic field
Junjie Lu, Xin Wu
https://arxiv.org/abs/2510.08954 https://

Chaos of charged particles near a renormalized group improved Kerr black hole in an external magnetic field
In a quantum theory of gravity, a renormalization group improved Kerr metric is obtained from the Kerr metric, where the Newton gravitational constant is modified as a function of the radial distance. The motion of neutral test particles in this metric is integrable. However, the dynamics of charged test particles is nonintegrable when an external asymptotically homogeneous magnetic field exists in the vicinity of the black hole. The transition from regular dynamics to chaotic dynamics is numer…

Room temperature optical control of spin states in organic diradicals
Rituparno Chowdhury, Alistair Inglis, Lucy E. Walker, Petri Murto, Chiara Delpiano-Cordeiro, Colin Morrison, Naitik A. Panjwani, Yao Fu, Yan Sun, Wei Zhou, Peter J. Skabara, Akshay Rao, Alexei Chepelianskii, Hugo Bronstein, Sam L. Bayliss, Richard H. Friend
https://arxiv…

Room temperature optical control of spin states in organic diradicals
We report a family of luminescent alternant diradicals which, at room temperature, support a ground-state spin-triplet, near-unity photoluminescence quantum yields, and optical spin addressability. These diradicals comprise trityl groups meta-linked via pyridyl or phenyl groups, enabling optically bright triplet-to-triplet and singlet-to-singlet transitions. At room temperature, we observe optically detected magnetic resonance in these systems at zero magnetic field and a strong magneto-photolu…

Microwave electrometry with quantum-limited resolutions in a Rydberg atom array
Yao-Wen Zhang, De-Sheng Xiang, Ren Liao, Hao-Xiang Liu, Biao Xu, Peng Zhou, Yijia Zhou, Kuan Zhang, Lin Li
https://arxiv.org/abs/2512.05413 https://arxiv.org/pdf/2512.05413 https://arxiv.org/html/2512.05413
arXiv:2512.05413v1 Announce Type: new
Abstract: Microwave (MW) field sensing is foundational to modern technology, yet its evolution, reliant on classical antennas, is constrained by fundamental physical limits on field, temporal, and spatial resolutions. Here, we demonstrate an MW electrometry that simultaneously surpasses these constraints by using individual Rydberg atoms in an optical tweezer array as coherent sensors. This approach achieves a field sensitivity within 13% of the standard quantum limit, a response time that exceeds the Chu limit by more than 11 orders of magnitude, and in-situ near-field mapping with {\lambda}/3000 spatial resolution. This work establishes Rydberg-atom arrays as a powerful platform that unites quantum-limited sensitivity, nanosecond-scale response time, and sub-micrometer resolution, opening new avenues in quantum metrology and precision electromagnetic field imaging.
toXiv_bot_toot

Coherent Optical Control of Electron Dynamics in Patterned Graphene Nanoribbons
Riek H. R\"ustemeier, H. P. Ojeda Collado, Ludwig Mathey
https://arxiv.org/abs/2510.08678 ht…

Coherent Optical Control of Electron Dynamics in Patterned Graphene Nanoribbons
The field of coherent electronics aims to advance electronic functionalities by utilizing quantum coherence. Here, we demonstrate a viable and versatile methodology for controlling electron dynamics optically in graphene nanoribbons. In particular, we propose to flatten the band structure of armchair graphene nanoribbons via control electrodes, arranged periodically along the extended direction of the nanoribbon. This addresses a key mechanism for dephasing in solids, which derives from the mom…

Noncommutative Bianchi I and III Cosmology Models: Radiation Era Dynamics and gamma Estimation
G. Oliveira-Neto, Y. Soncco Apaza
https://arxiv.org/abs/2510.08796 https://…

Noncommutative Bianchi I and III Cosmology Models: Radiation Era Dynamics and gamma Estimation
Understanding the early evolution of the universe requires models that incorporate possible quantum and anisotropic effects in its dynamics. In this work, we analyze the dynamical evolution of locally rotationally symmetric anisotropic cosmological models of Bianchi type I (flat curvature) and Bianchi type III (open curvature) within a noncommutative phase space framework characterized by a deformation parameter gamma. Using a Hamiltonian formulation based on Schutz formalism for a perfect radi…

Crosslisted article(s) found for quant-ph. https://arxiv.org/list/quant-ph/new
[1/1]:
- Crystal-Field--Driven Magnetoelectricity in the Triangular Quantum Magnet CeMgAl$_{11}$O$_{19}$
Sonu Kumar, et al.

Replaced article(s) found for cond-mat.mtrl-sci. https://arxiv.org/list/cond-mat.mtrl-sci/new
[1/1]:
- Quantum Defects in 2D Transition Metal Dichalcogenides for Terahertz Technologies
Jingda Zhang, Su Ying Quek

Chern insulators and topological flat bands in cavity-embedded kagome systems
Hikaru Goto, Ryo Okugawa, Takami Tohyama
https://arxiv.org/abs/2510.09150 https://

Chern insulators and topological flat bands in cavity-embedded kagome systems
We investigate topological band structures of a kagome system coupled to a circularly polarized cavity mode, using a model based on a muffin-tin potential and quantum light-matter interaction. We show that Chern insulating phases emerge in the cavity-embedded kagome system due to the light-matter interaction that breaks time-reversal symmetry. We also find that a nearly flat band can be topologically nontrivial with a nonzero Chern number. By varying the light-matter interaction, we also reveal…

Spin-Locking Spectroscopy of Harmonic Motion
Florian Kranzl, Adria Rospars, Johannes Franke, Manoj K. Joshi, Rainer Blatt, Christian F. Roos
https://arxiv.org/abs/2510.08732 htt…

Spin-Locking Spectroscopy of Harmonic Motion
Characterization of noise of a quantum harmonic oscillator is important for many experimental platforms. We experimentally demonstrate motional spin-locking spectroscopy, a method that allows us to directly measure the motional noise spectrum of a quantum harmonic oscillator. We measure motional noise of a single trapped ion in a frequency range from 200 Hz to 5 kHz with a power spectral density that resolves noise over two orders of magnitude. Coherent modulations in the oscillation frequency …

Real-Time Instantons in Complex-Driven Qubits
Samuel Alperin
https://arxiv.org/abs/2510.08820 https://arxiv.org/pdf/2510.08820

Real-Time Instantons in Complex-Driven Qubits
We consider the dynamics of the quantum Rabi model driven parametrically by a periodic modulation of a complex coupling. We show both analytically and numerically that instead of Rabi oscillations, this nonunitary coherent driving leads to a unidirectional instanton solution which mediates the rapid and deterministic one-way tunneling of any initial coherent state to the ground state, making the ground state a strong attractor in the quantum dynamics of the qubit. The timescale of this tunnelin…

Germany-based Quantum Systems, which sells surveillance drones that are being used by Ukraine, raised €180M, tripling its valuation to €3B since May (Christina Kyriasoglou/Bloomberg)
https://www.bloomberg.com/news/articles/202…

Defense Startup Quantum Systems Triples Valuation to €3 Billion
Quantum Systems, a German drone maker backed by Peter Thiel, boosted its valuation to €3 billion ($3.5 billion) in a new funding round as the defense startup plans to increase production capacity of unmanned aerial systems.

Exploiting higher-order correlation functions for photon-statistics-based characterization and reconstruction of arbitrary Gaussian states
Philip Heinzel, Ren\'e Sondenheimer
https://arxiv.org/abs/2510.09083

Exploiting higher-order correlation functions for photon-statistics-based characterization and reconstruction of arbitrary Gaussian states
Gaussian states are an essential building block for various applications in quantum optics and quantum information science, yet the precise relation between their second- and third-order correlation functions remains not fully explored. We discuss connections between these correlation functions by constructing an explicit decomposition formula for arbitrary sixth-order moments of ladder operators for general Gaussian states and demonstrate how the derived relations enable state classification f…

Clarification of Floquet--Enhanced Thermal Emission Through the Nonequilibrium Green's Function Formalism
Yuhua Ren, Hui Pan, Jian-Sheng Wang
https://arxiv.org/abs/2510.09300

Clarification of Floquet--Enhanced Thermal Emission Through the Nonequilibrium Green's Function Formalism
Floquet engineering offers a powerful route to enhance emission in time-modulated media. Here, we investigate the influence of time-modulated permittivity in silicon carbide on its intensity spectrum. We consider both the nonequilibrium Green's function approach and the macroscopic quantum electrodynamics approach, and establish their formal compatibility by deriving the Lippmann-Schwinger equation in both cases. To analyze spectral features, we propose several methods for decomposing the elect…

The charge-singlet measurement toolbox
Abhijit Chakraborty, Randy Lewis, Christine A. Muschik
https://arxiv.org/abs/2510.08718 https://arxiv.org/pdf/2510.0…

The charge-singlet measurement toolbox
Symmetry is fundamental to physical laws across different scales$\unicode{x2014}$from spacetime structure in general relativity to particle interactions in quantum field theory. Local symmetries, described by gauge theories, are central to phenomena such as superconductivity, topological phases, and the Standard Model of particle physics. Emerging simulation techniques using tensor network states or quantum computers offer exciting new possibilities of exploring the physics of these gauge theor…

Google says its Willow quantum chip using a new Quantum Echoes algorithm ran computations 13,000x faster than supercomputers, aiding drug and materials research (Cade Metz/New York Times)
https://www.nytimes.com/2025/10/22/technology/googles-quantum-computer-…

Google’s Quantum Computer Makes a Big Technical Leap
Designed to accelerate advances in medicine and other fields, the tech giant’s quantum algorithm runs 13,000 times as fast as software written for a traditional supercomputer.

Fiber-optic power limiter device based on carbon nanotubes
Ekaterina Borisova, Anastasiya Ponosova, Natalia Arutyunyan, Alexey Shilko, Elena Obraztsova, Boris Galagan, Vadim Makarov
https://arxiv.org/abs/2510.09301

Fiber-optic power limiter device based on carbon nanotubes
We experimentally demonstrate a power limiter based on single-walled carbon nanotubes dispersed in a polymer matrix. This simple fiber-optic device permanently increases its attenuation when subjected to 50-mW or higher cw illumination at 1550 nm and initiates a fiber-fuse effect at 1 to 5 W. It may be used for protecting quantum key distribution equipment from light-injection attacks. We demonstrate its compatibility with phase- and polarisation-encoding quantum key distribution systems.

Quantinuum unveils Helios, a quantum computer with 98 physical qubits, from which it can deliver 48 logical error-corrected qubits, an impressive 2:1 ratio (Isabelle Bousquette/Wall Street Journal)
https://www.wsj.com/articles/the-next-big-

An interview with IBM CEO Arvind Krishna on why there's no AI bubble, his view that Watson's healthcare push was "inappropriate", IBM's quantum bet, and more (Nilay Patel/The Verge)
https://www.theverge.com/podcast/829868/ib

Why IBM CEO Arvind Krishna is still hiring humans in the AI era
IBM CEO Arvind Krishna on Watson, the AI bubble, and why he’s hiring college grads.

Control of photoionization by resonant phase-locked pulse pairs
Edvin Olofsson, Evan Lovelle Fulton, Rezvan Tahouri, Mattias Bertolino, Jean Marcel Ngoko Djiokap, Jan Marcus Dahlstr\"om
https://arxiv.org/abs/2510.09441

Control of photoionization by resonant phase-locked pulse pairs
We study the nonlinear and resonant process of two-photon ionization of atoms (He and H) in a pump-probe scheme. The pump pulse prepares the quantum system in a superposition of the ground state and an excited bound state. By varying the phase difference between the pulses, we show how it is possible to coherently control the dressed-state population during the probe pulse. Our main result is that for certain laser parameters, the control over the dressed state population leads to strong contro…