Tootfinder

fullerene_structures: Fullerene molecular structures
Fifteen networks of carbon atoms and the atomic bonds that connect them within molecules of fullerenes, from 60 atoms up to 6000 atoms. A bond is defined to exist whenever the distance of two atoms is less than 1.5 angstrom.
This network has 1500 nodes and 2250 edges.
Tags: Biological, Chemical, Unweighted, Spatial

Towards a Twisted Atom Laser: Cold Atoms Released from Helical Optical Tube Potentials
Amine Jaouadi, Andreas Lyras, Vasileios E. Lembessis
https://arxiv.org/abs/2508.13711 http…

Towards a Twisted Atom Laser: Cold Atoms Released from Helical Optical Tube Potentials
We study the quantum dynamics of cold atoms initially confined in a Helical Optical Tube (HOT) and subsequently released into free space. This helicoidal potential, engineered via structured light fields with orbital angular momentum, imposes a twisted geometry on the atomic ensemble during confinement. We examine how this geometry shapes the initial quantum state particularly its spatial localization and phase structure and how these features influence the subsequent free evolution. Our analys…

$p$-orbital self-organization of ultracold atoms coupled to optical cavities
Hui Tan, Pengfei Zhang, Jianmin Yuan, Yongqiang Li
https://arxiv.org/abs/2508.13410 https://

$p$-orbital self-organization of ultracold atoms coupled to optical cavities
Atoms coupled to optical cavities provide a novel platform for understanding high-orbital exotic phenomena in strongly correlated materials. In this study, we investigate strongly correlated ultracold bosonic gases that are coupled to two orthogonally arranged optical cavities and driven by a blue-detuned running-wave laser field. Our results demonstrate that atoms initially in the $s$-orbital state can be scattered into $p_x$- and $p_y$-orbital states in either a symmetric or asymmetric manner…

A roundup of VLSI conference 2025, including the use of digital twins for design exploration, DRAM beyond 1x nm nodes, Intel's 18A process vs. TSMC, and more (SemiAnalysis)
https://semianalysis.com/2025/07/21/vlsi2025/

Intel 18A Details & Cost, Future of DRAM 4F2 vs 3D, Backside Power Adoption (or Not), China’s FlipFET, Digital Twins from Atoms to Fabs, and More
Long time readers will recall that SemiAnalysis covers more than just datacenters and AMD. Today we’re back to semiconductors with a tech-focused roundup of the best from this year’s VLSI conferenc…

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…

"Nuclear waste could be a source of fuel in future reactors"
#NuclearPower #Energy
https://

Nuclear waste could be a source of fuel in future reactors
From electric cars to artificial intelligence (AI) data centers, the technologies people use every day require a growing need for electricity. In theory, nuclear fusion—a process that fuses atoms together, releasing heat to turn generators—could provide vast energy supplies with minimal emissions. But nuclear fusion is an expensive prospect because one of its main fuels is a rare version of hydrogen called tritium.

On the set of atoms and strong atoms in additive monoids of cyclic semidomains
Jiya Dani, Anna Deng, Marly Gotti, Bryan Li, Arav Paladiya, Joseph Vulakh, Jason Zeng
https://arxiv.org/abs/2508.11319

On the set of atoms and strong atoms in additive monoids of cyclic semidomains
Let $M$ be a cancellative and commutative monoid. A non-invertible element of $M$ is called an atom (or irreducible element) if it cannot be factored into two non-invertible elements, while an atom $a$ of $M$ is called strong if $a^n$ has a unique factorization in $M$ for every $n \in \mathbb{N}$. The monoid $M$ is atomic if every non-invertible element factors into finitely many atoms (repetitions allowed). For an algebraic number $α$, we let $M_α$ denote the additive monoid of the subsemiri…

Reasoning is about giving reasons
Krunal Shah, Dan Roth
https://arxiv.org/abs/2508.14488 https://arxiv.org/pdf/2508.14488

Reasoning is about giving reasons
Convincing someone of the truth value of a premise requires understanding and articulating the core logical structure of the argument which proves or disproves the premise. Understanding the logical structure of an argument refers to understanding the underlying "reasons" which make up the proof or disproof of the premise - as a function of the "logical atoms" in the argument. While it has been shown that transformers can "chain" rules to derive simple arguments, the challenge of articulating t…

Machine Learning Prediction of Magnetic Proximity Effect in van der Waals Heterostructures: From Atoms to Moir\'e
Lukas Cvitkovich, Klaus Zollner, Jaroslav Fabian
https://arxiv.org/abs/2508.12406

Machine Learning Prediction of Magnetic Proximity Effect in van der Waals Heterostructures: From Atoms to Moiré
We introduce a machine learning framework that efficiently predicts large-scale proximity-induced magnetism in van der Waals heterostructures, overcoming the high computational cost of density functional theory (DFT). We apply it to graphene/Cr$_2$Ge$_2$Te$_6$, which exhibits a previously unrecognized dichotomy. Unlike the spin polarization at the Fermi level, which follows the pseudospin, the proximity-induced magnetic moments vary across carbon atoms, defying analytical modeling. To address t…

Dark matter detection using optically trapped Rydberg atom tweezer arrays
So Chigusa, Taiyo Kasamaki, Toshi Kusano, Takeo Moroi, Kazunori Nakayama, Naoya Ozawa, Yoshiro Takahashi, Atsuhiro Umemoto, Amar Vutha
https://arxiv.org/abs/2507.12860

Dark matter detection using optically trapped Rydberg atom tweezer arrays
A new scheme for detecting wave-like dark matter (DM) using Rydberg atoms is proposed. Recent advances in trapping and manipulating Rydberg atoms make it possible to use Rydberg atoms trapped in optical tweezer arrays for DM detection. We present a simple and innovative experimental procedure that searches for excitations of trapped Rydberg atoms due to DM-induced electric field. A scan over DM mass is enabled with the use of the Zeeman and diamagnetic shifts of energy levels under an applied e…

HBAR entropy in causal diamond geometry: A near-horizon perspective
Nada Eissa, Carlos R. Ord\'o\~nez, Gustavo Valdivia-Mera
https://arxiv.org/abs/2508.13493 https://…

HBAR entropy in causal diamond geometry: A near-horizon perspective
In this article we extend the Horizon Brightened Acceleration Radiation (HBAR) framework to the causal diamond (CD) spacetime. We study a cloud of two-level atoms, injected at random times in the asymptotic past of the CD, freely falling toward its causal horizon and emitting scalar radiation via a weak dipole coupling to a quantum field. In the near-horizon region, an emergent conformal symmetry-captured by conformal quantum mechanics (CQM)-governs the field dynamics and allows analytic contro…

fullerene_structures: Fullerene molecular structures
Fifteen networks of carbon atoms and the atomic bonds that connect them within molecules of fullerenes, from 60 atoms up to 6000 atoms. A bond is defined to exist whenever the distance of two atoms is less than 1.5 angstrom.
This network has 3840 nodes and 5760 edges.
Tags: Biological, Chemical, Unweighted, Spatial

Splitting a graph by a given partition of the set of vertices based on the minimum weight of the induced trees
V. A. Buslov
https://arxiv.org/abs/2507.11909

Splitting a graph by a given partition of the set of vertices based on the minimum weight of the induced trees
A method for considering a weighted directed graph with an accuracy of up to a given partition of the set of vertices is proposed. The resulting digraph (the splitting graph) does not contain arcs inside each partition element, and the arcs between the partition atoms are calculated in a special way taking into account the arcs of the original directed graph inside the atoms. This accounting is based on minimal trees defined on atoms. A study was made of what information about the original digr…

Formation of methane and cyclohexane through the hydrogenation of toluene
A. T. Hopkinson, F. G. Doktor, J. Pitfield, M. Moll, J. D. Thrower, L. Hornek{\ae}r
https://arxiv.org/abs/2508.13864

Formation of methane and cyclohexane through the hydrogenation of toluene
Methylated polycyclic aromatic hydrocarbons (PAHs) have been hypothesised to be present in the interstellar medium (ISM) through their 3.4 and 6.9 $μ$m absorption bands. To investigate the hydrogenation of these methylated PAHs, the simplest, toluene ($\mathrm{CH_3C_6H_5}$), was exposed to H-atoms. This demonstrated how the presence of a methyl group changes the reactivity towards atomic hydrogen as compared to benzene and other PAHs and how this may alter its chemistry in the ISM. Toluene was…

Microscopic magnetic field imaging with hot atoms via single-pixel imaging
Cyril Torre, Jordan Brass, Sebastien Bisdee, Mohammed T. Rasheed, Giacomo Ferranti, Carrie A. Weidner
https://arxiv.org/abs/2508.13869

Fast hydrogen atom diffraction through monocrystalline graphene
Pierre Guichard, Arnaud Dochain, Rapha\"el Marion, Pauline de Crombrugghe de Picquendaele, Nicolas Lejeune, Beno\^it Hackens, Paul-Antoine Hervieux, Xavier Urbain
https://arxiv.org/abs/2508.13175

Fast hydrogen atom diffraction through monocrystalline graphene
We report fast atom diffraction through single-layer graphene using hydrogen atoms at kinetic energies from 150 to 1200 eV. High-resolution images reveal overlapping hexagonal patterns from coexisting monocrystalline domains. Time-of-flight tagging confirms negligible energy loss, making the method suitable for matter-wave interferometry. The diffraction is well described by the eikonal approximation, with accurate modeling requiring the full 3D interaction potential from DFT. Simpler models fa…

Root Cause Analysis of Hydrogen Bond Separation in Spatio-Temporal Molecular Dynamics using Causal Models
Rahmat K. Adesunkanmi, Ashfaq Khokhar, Goce Trajcevski, Sohail Murad
https://arxiv.org/abs/2508.12500

Root Cause Analysis of Hydrogen Bond Separation in Spatio-Temporal Molecular Dynamics using Causal Models
Molecular dynamics simulations (MDS) face challenges, including resource-heavy computations and the need to manually scan outputs to detect "interesting events," such as the formation and persistence of hydrogen bonds between atoms of different molecules. A critical research gap lies in identifying the underlying causes of hydrogen bond formation and separation -understanding which interactions or prior events contribute to their emergence over time. With this challenge in mind, we propose leve…

Ground and low-lying excited state potential energy surfaces of diiodomethane in four dimensions
Yijue Ding
https://arxiv.org/abs/2508.14843 https://arxiv.…

Ground and low-lying excited state potential energy surfaces of diiodomethane in four dimensions
We report a set of adiabatic potential energy surfaces (PESs) for diiodomethane, including the ground electronic state and all excited states accessible via single-photon absorption near 260 nm. Although constrained to four dimensions, these PESs capture the essential photochemical processes following photoexcitation--namely, bond breaking and rearrangement among the methyl radical and the two iodine atoms. Constructed using an accurate and efficient spline interpolation algorithm, the PESs rep…

Quantum Control of Thermal Emission from Photonic Crystals with Two-Level Atoms
Chih-Wei Wang, Jhih-Sheng Wu
https://arxiv.org/abs/2508.11191 https://arxiv…

Quantum Control of Thermal Emission from Photonic Crystals with Two-Level Atoms
Thermal light engineering is a field of considerable interest and potential. We study quantum light-matter interactions in a one-dimensional photonic crystal with two-level atoms as the active medium, replacing classical oscillators in traditional blackbody models. In a thermal bath with pumping, these atoms modulate thermal emission via interactions with photonic modes. The model with quantum two-level systems enables the processes of spontaneous emission, stimulated absorption, and stimulated…

Electromagnetics of deeply subwavelength metamaterial particles
Aleksander O. Makarenko, Maxim A. Yurkin, Alexey A. Shcherbakov, Mikhail Lapine
https://arxiv.org/abs/2509.14690 …

Electromagnetics of deeply subwavelength metamaterial particles
This article discusses electromagnetic properties of volumetric metamaterial samples with essentially discrete structure, that is, assembled as a periodic array of electromagnetic resonators. We develop an efficient numerical procedure for calculating quasi-static electromagnetic response precisely to analyse samples containing several million meta-atoms. We demonstrate that, contrary to a common belief, even million-``atoms'' samples with sharp edges are still quite different from uniform (``h…

Predicting temperature-dependent failure and transformation zones in 2D silica glass through quasistatic Gaussian Phase Packets
Miguel Sp\'inola, Shashank Saxena, Franz Bamer, Dennis M. Kochmann
https://arxiv.org/abs/2507.13960

Predicting temperature-dependent failure and transformation zones in 2D silica glass through quasistatic Gaussian Phase Packets
The athermal quasistatic (AQS) method is a powerful technique to study the mechanical behavior of disordered systems. However, its applicability is limited to temperatures near zero, where thermal activation is unlikely. In this work, we extend the AQS method to finite temperatures, based on a formulation that describes atoms as temperature-dependent Gaussian packets (GPPs) in phase space under quasistatic conditions, thus equivalent to minimum free energy conditions. This framework is used to …

Higher-order, generically complete, continuous, and polynomial-time isometry invariants of periodic sets
Daniel E Widdowson, Vitaliy A Kurlin
https://arxiv.org/abs/2509.15088 ht…

Higher-order, generically complete, continuous, and polynomial-time isometry invariants of periodic sets
Periodic point sets model all solid crystalline materials (crystals) whose atoms can be considered zero-sized points with or without atomic types. This paper addresses the fundamental problem of checking whether claimed crystals are novel, not noisy perturbations of known materials obtained by unrealistic atomic replacements. Such near-duplicates have already skewed ground truth because past comparisons relied on discontinuous cells and symmetries. The proposed Lipschitz continuity under noise …

A Haldane-Anderson Hamiltonian Model for Hyperthermal Hydrogen Scattering from a Semiconductor Surface
Xuexun Lu, Nils Hertl, Reinhard J. Maurer
https://arxiv.org/abs/2508.13360

A Haldane-Anderson Hamiltonian Model for Hyperthermal Hydrogen Scattering from a Semiconductor Surface
Collisions of atoms and molecules with metal surfaces create electronic excitations in the metal, leading to nonadiabatic energy dissipation, inelastic scattering, and sticking. Mixed quantum-classical molecular dynamics simulation methods, such as molecular dynamics with electronic friction, are able to capture nonadiabatic energy loss during dynamics at metal surfaces. Hydrogen atom scattering on semiconductors, on the other hand, exhibits strong adsorbate-surface energy transfer only when th…

Energy relaxation in superthermal collisions of carbon with oxygen: the influence of isotopic substitution
Cheikh T. Bop, Marko Gacesa
https://arxiv.org/abs/2508.12807 https://

Energy relaxation in superthermal collisions of carbon with oxygen: the influence of isotopic substitution
The transition from a once-dense Martian atmosphere to the thin one observed today implies a substantial loss of carbon, either through atmospheric escape or surface deposition. Accurately modeling this carbon escape necessitates accounting for collisions between energetic carbon atoms and the primary atmospheric constituents, including oxygen. To this end, we computed a highly accurate and comprehensive set of potential energy curves (PECs) for the C($^3$P) + O($^3$P) system. Based on these PE…

Production of ultracold asymmetric tops from Sr atoms and SrOH molecules
Maciej B. Kosicki, Mateusz Borkowski, Marcin Umi\'nski, Piotr S. \.Zuchowski
https://arxiv.org/abs/2508.14543

Replaced article(s) found for nucl-ex. https://arxiv.org/list/nucl-ex/new
[1/1]:
- Lifetime measurement of the muonic atoms of enriched Si isotopes
R. Mizuno, et al.

Coherence of Microwave and Optical Qubit Levels in Neutral Thulium
Denis Mishin, Dmitry Tregubov, Nikolay Kolachevsky, Artem Golovizin
https://arxiv.org/abs/2508.12887 https://

Coherence of Microwave and Optical Qubit Levels in Neutral Thulium
Hyperfine-encoded qubits in alkali atoms have established themselves as robust platforms for quantum computing, while alkaline-earth-like elements expand the state manipulation toolbox through their rich spectrum of optical transitions and metastable states. In this work, we demonstrate that thulium is a viable candidate for quantum computing, combining advantages of hyperfine qubit encoding with a rich energy-level structure of alkaline-earth-like atoms. We describe protocols for the initial s…

fullerene_structures: Fullerene molecular structures
Fifteen networks of carbon atoms and the atomic bonds that connect them within molecules of fullerenes, from 60 atoms up to 6000 atoms. A bond is defined to exist whenever the distance of two atoms is less than 1.5 angstrom.
This network has 180 nodes and 270 edges.
Tags: Biological, Chemical, Unweighted, Spatial

$K$-analogues of Hivert's divided difference operators
Laura Pierson
https://arxiv.org/abs/2508.11813 https://arxiv.org/pdf/2508.11813

$K$-analogues of Hivert's divided difference operators
Several families of polynomials of combinatorial and representation theoretic interest (notably the Schur polynomials $s_λ$, Demazure characters $\mathfrak{D}_a$, and Demazure atoms $\mathfrak{A}_a$) can be defined in terms of divided difference operators. Hivert (2000) defines "fundamental analogues" of these divided difference operators, and Hivert and Hicks-Niese show in arXiv:2406.02420 that the polynomials that arise from those fundamental operators in analogous ways to the three families…

Improving structure search with hyperspatial optimization and TETRIS seeding
Daviti Gochitashvili, Maxwell Meyers, Cindy Wang, Aleksey N. Kolmogorov
https://arxiv.org/abs/2507.13791

Improving structure search with hyperspatial optimization and TETRIS seeding
Advanced structure prediction methods developed over the past decades include an unorthodox strategy of allowing atoms to displace into extra dimensions. A recently implemented global optimization of structures from hyperspace (GOSH) has shown promise in accelerating the identification of global minima on potential energy surfaces defined by simple interatomic models. In this study, we extend the GOSH formalism to more accurate Behler-Parrinello neural network (NN) potentials, make it compatibl…

Disjunctions of Two Dependence Atoms
Nicolas Fr\"ohlich, Phokion G. Kolaitis, Arne Meier
https://arxiv.org/abs/2508.16146 https://arxiv.org/pdf/2508.1…

Disjunctions of Two Dependence Atoms
Dependence logic is a formalism that augments the syntax of first-order logic with dependence atoms asserting that the value of a variable is determined by the values of some other variables, i.e., dependence atoms express functional dependencies in relational databases. On finite structures, dependence logic captures NP, hence there are sentences of dependence logic whose model-checking problem is NP-complete. In fact, it is known that there are disjunctions of three dependence atoms whose mod…

Replaced article(s) found for hep-th. https://arxiv.org/list/hep-th/new
[2/2]:
- Vertex corrections and wavefunction renormalization for atoms, nuclei, and other heavy composite ...
Ryan Plestid, Mark B. Wise

Evaluation of bound-state $\beta^-$-decay half-lives of fully ionized atoms
Priyanka Choudhary, Chong Qi
https://arxiv.org/abs/2507.08199 https://

Evaluation of bound-state $β^-$-decay half-lives of fully ionized atoms
Bound-state $β^-$-decay is a rare radioactive process where the created electron is trapped in an atomic orbital instead of being emitted. It can be observed in highly ionized atoms in particular when normal beta decay is energetically forbidden, but bound-state decay is still possible. In this work we present a systematic theoretical study on the bound-state $β^-$-decay of fully ionized atoms where key nuclear inputs include the nuclear matrix elements (expressed through $ft$ values) and the…

Sparse Coding Representation of 2-way Data
Boya Ma, Abram Magner, Maxwell McNeil, Petko Bogdanov
https://arxiv.org/abs/2509.10033 https://arxiv.org/pdf/250…

Sparse Coding Representation of 2-way Data
Sparse dictionary coding represents signals as linear combinations of a few dictionary atoms. It has been applied to images, time series, graph signals and multi-way spatio-temporal data by jointly employing temporal and spatial dictionaries. Data-agnostic analytical dictionaries, such as the discrete Fourier transform, wavelets and graph Fourier, have seen wide adoption due to efficient implementations and good practical performance. On the other hand, dictionaries learned from data offer spar…

Splitting of the three-body F\"orster resonance in Rb Rydberg atoms as a measure of dipole-dipole interaction strength
I. I. Ryabtsev, I. N. Ashkarin, I. I. Beterov, D. B. Tretyakov, E. A. Yakshina, V. M. Entin, P. Cheinet
https://arxiv.org/abs/2507.13658

Replaced article(s) found for hep-ph. https://arxiv.org/list/hep-ph/new
[2/2]:
- Resonant history of gravitational atoms in black hole binaries
Giovanni Maria Tomaselli, Thomas F. M. Spieksma, Gianfranco Bertone

Unifying Common Signal Analyses with Instantaneous Time-Frequency Atoms
Steven Sandoval, Phillip L. De Leon
https://arxiv.org/abs/2508.05380 https://arxiv.…

Unifying Common Signal Analyses with Instantaneous Time-Frequency Atoms
In previous work, we presented a general framework for instantaneous time-frequency analysis but did not provide any specific details of how to compute a particular instantaneous spectrum (IS). In this work, we use instantaneous time-frequency atoms to obtain an IS associated with common signal analyses: time domain analysis, frequency domain analysis, fractional Fourier transform, synchrosqueezed short-time Fourier transform, and synchrosqueezed short-time fractional Fourier transform. By doin…

A Particle-Flow Algorithm for Free-Support Wasserstein Barycenters
Kisung You
https://arxiv.org/abs/2509.11435 https://arxiv.org/pdf/2509.11435

A Particle-Flow Algorithm for Free-Support Wasserstein Barycenters
The Wasserstein barycenter extends the Euclidean mean to the space of probability measures by minimizing the weighted sum of squared 2-Wasserstein distances. We develop a free-support algorithm for computing Wasserstein barycenters that avoids entropic regularization and instead follows the formal Riemannian geometry of Wasserstein space. In our approach, barycenter atoms evolve as particles advected by averaged optimal-transport displacements, with barycentric projections of optimal transport …

Suppression of coherent light scattering in a three-dimensional atomic array
Yu-Kun Lu, Hanzhen Lin, Jiahao Lyu, Yoo Kyung Lee, Vitaly Fedoseev, Wolfgang Ketterle
https://arxiv.org/abs/2508.10966

Suppression of coherent light scattering in a three-dimensional atomic array
Understanding how atoms collectively interact with light is not only important for fundamental science, but also crucial for designing light-matter interfaces in quantum technologies. Over the past decades, numerous studies have focused on arranging atoms in ordered arrays and using constructive (destructive) interference to enhance (suppress) the coupling to electromagnetic fields, thereby tailoring collective light-matter interactions. These studies have mainly focused on one- and two-dimensi…

An nl-model with a full radiative transfer treatment for level populations of hydrogen atoms in a spherically symmetric H II region
F. -Y. Zhu, J. Wang, Y. Qiu, Q. -F. Zhu, D. Quan
https://arxiv.org/abs/2509.12806

An nl-model with a full radiative transfer treatment for level populations of hydrogen atoms in a spherically symmetric H II region
Context. The radiation field consisting of hydrogen recombination lines and continuum emission might significantly affect the hydrogen-level populations in ultra- and hypercompact (U/HC) H II regions. The escape probability approximation was used to estimate the effect of the radiation field in previous models for calculating hydrogen-level populations. The reliability of this approximation has not been systematically studied, however. Aims. We investigate the appropriate ranges of previous mod…

🤹🏻‍♂️ One billion-year-old rules of protein stability revealed; could lead to faster drug and enzyme design
https://phys.org/news/2025-07-billion-year-protein-stability-revealed.html

One billion-year-old rules of protein stability revealed; could lead to faster drug and enzyme design
Proteins are life's molecular workhorses, doing everything from turning sunlight into food to fighting viruses. They are built from 20 different types of amino acid molecules, so even a small protein made of 60 amino acids in length can, in theory, be constructed in a quinquavigintillion (1078) different ways. That's about as many atoms as there are in the entire universe.

Elementary Monte Carlo model of the anisotropic recrystallization and antiripening under intensive stirring and high supersaturations
Serhii Abakumov, Eugen Rabkin, Andriy Gusak
https://arxiv.org/abs/2508.13799

Elementary Monte Carlo model of the anisotropic recrystallization and antiripening under intensive stirring and high supersaturations
Known method of fibrous oxides production (first of all, V2O5) by intensive stirring in water is treated in the frame of driven systems approach developed in 80s by Georges Martin et al for systems under irradiation or severe plastic deformation. Instead of ballistic diffusion, the ballistic detachments of atoms from the oxide surface under stirring are introduced. Simplified Monte Carlo scheme is suggested for crystal evolution within TLK model, taking into account anisotropy and additional at…

Controlled Polarization Switch in a Polariton Josephson Junction
Valeria A. Maslova, Nina S. Voronova
https://arxiv.org/abs/2509.14533 https://arxiv.org/pd…

Controlled Polarization Switch in a Polariton Josephson Junction
The interaction between a particle's spin and momentum -- known as spin-orbit (SO) coupling -- is the cornerstone of modern spintronics. In Bose-Einsten condensates of ultracold atoms, SO coupling can be implemented and precisely controlled experimentally; photonic systems, on the other hand, possess an intrinsic SO interaction due to the longitudinal-transverse splitting of the photon modes. In this work, we focus on such spinor, SO-coupled exciton-polariton condensates on a ring, where the st…

The Signature of Sub-galactic Dark Matter Clumping in the Global 21-cm Signal of Hydrogen
Hyunbae Park, Rennan Barkana, Naoki Yoshida, Sudipta Sikder, Rajesh Mondal, Anastasia Fialkov
https://arxiv.org/abs/2509.11055

The Signature of Sub-galactic Dark Matter Clumping in the Global 21-cm Signal of Hydrogen
It is thought that the Universe went through an early period known as the Dark Ages, during which primeval density fluctuations grew to form the first luminous objects, marking the beginning of Cosmic Dawn around 100 million years after the Big Bang. The 21-cm line of hydrogen atoms is the most promising probe of these epochs, with extensive observational efforts underway. We combine hydrodynamical simulations with a large-scale grid in order to precisely calculate the effect of non-linear stru…

Birational Invariants from Hodge Structures and Quantum Multiplication
Ludmil Katzarkov, Maxim Kontsevich, Tony Pantev, Tony Yue YU
https://arxiv.org/abs/2508.05105 https://

Birational Invariants from Hodge Structures and Quantum Multiplication
We introduce new invariants of smooth complex projective varieties, called Hodge atoms. Their construction combines rational Gromov-Witten invariants with classical Hodge theory and relies on the notion of an F-bundle, which is a non-archimedean version of a non-commutative Hodge structure. The Hodge atoms arise from the spectral decomposition of the F-bundle under the Euler vector field action, and behave additively under blowups, in accordance with Iritani's blowup theorem. We compute several…

Metrology using atoms in an array of double-well potentials
Danish Ali Hamza, Jan Chwede\'nczuk
https://arxiv.org/abs/2507.11395 https://

Metrology using atoms in an array of double-well potentials
Quantum effects, such as entanglement, Einstein-Podolsky-Rosen steering, and Bell correlations, can enhance metrological sensitivity beyond the standard quantum limit. These correlations are typically generated through interactions between atoms or molecules, or during the passage of a laser pulse through a birefringent crystal. Here, we consider an alternative method of generating scalable, many-body entangled states, and demonstrate their usability for quantum-enhanced metrology. Our setup is…

Extension of Second-Principles Density Functional Theory into the time domain
Toraya Fern\'andez-Ruiz, Jorge \'I\~niguez, Javier Junquera, Pablo Garc\'ia-Fern\'andez
https://arxiv.org/abs/2507.13824

Extension of Second-Principles Density Functional Theory into the time domain
We present an extension of the second-principles density functional theory (SPDFT) method to perform time-dependent simulations. Our approach, which calculates the evolution of the density matrix in real time and real space using the Liouville-von Neumann equation of motion, allows determining optical and transport properties for very large systems, involving tens of thousands of atoms, using very modest computational platforms. In contrast with other methods, we show that SPDFT can be applied …

Enhancement of Weak Interactions in Phase Transitions
V. V. Flambaum
https://arxiv.org/abs/2509.14701 https://arxiv.org/pdf/2509.14701

Enhancement of Weak Interactions in Phase Transitions
Weak interactions cause small parity-violating energy differences between left- and right-handed chiral systems. Although normally tiny, these effects may be significantly enhanced during collective phenomena such as phase transitions. We propose a theoretical model describing the enhancement of weak interactions in phase transitions. The enhancement factor is proportional to the critical number of atoms, $N_c$, in the nucleus of the new phase. After the nucleus reaches its critical size, it gr…

Perspective: Practical Atom-Based Quantum Sensors
Justin M. Brown, Thad G. Walker
https://arxiv.org/abs/2507.13111 https://arxiv.org/…

Perspective: Practical Atom-Based Quantum Sensors
Atomic vapors, manipulated and probed by light and other electromagnetic fields, constitute versatile and powerful quantum systems for sensing applications. Atoms are identical, isolatable, interfaceable, and intelligible. These features, coupled with the relative simplicity with which quantum properties can be exploited in state preparation and detection using modern laser and electro-optic tools, make atoms very attractive for sensing applications. This Perspective discusses the potential and…

fullerene_structures: Fullerene molecular structures
Fifteen networks of carbon atoms and the atomic bonds that connect them within molecules of fullerenes, from 60 atoms up to 6000 atoms. A bond is defined to exist whenever the distance of two atoms is less than 1.5 angstrom.
This network has 180 nodes and 270 edges.
Tags: Biological, Chemical, Unweighted, Spatial

Zero-energy resonances in ultracold hydrogen sticking to liquid helium films of finite thickness
R. Karahanyan, A. Voronin, V. Nesvizhevsky, A. Semakin, S. Vasiliev
https://arxiv.org/abs/2509.14652

Zero-energy resonances in ultracold hydrogen sticking to liquid helium films of finite thickness
We investigated quantum states of ultracold hydrogen atoms in a combined potential comprising the H-He film interaction in the presence of a substrate and the Earth gravitational field. We show that the shift and width of the gravitational quantum states are determined by the complex scattering length for the H-He film-substrate potential. We demonstrate that for specific helium film thicknesses above a substrate, zero-energy resonances occur if the combined potential supports a bound state exa…

Oscillating bound states in waveguide-QED system with two giant atoms
F. J. L\"u, W. Z. Jia
https://arxiv.org/abs/2508.09338 https://arxiv.org/pdf/250…

Oscillating bound states in waveguide-QED system with two giant atoms
We study the bound states in the continuum (BIC) in a system of two identical two-level giant atoms coupled to a one-dimensional waveguide. By deriving general dark-state conditions, we clarify how coupling configurations and atomic parameters influence decay suppression. Through analysis of the long-time dynamical behaviors of atoms and bound photons, we carry out a detailed classification of bound states and explore the connections between these dynamical behaviors and the system's intrinsic …

Longest increasing subsequences for distributions with atoms, and an inhomogeneous Hammersley process
Anne-Laure Basdevant (LPSM), Lucas Gerin (CMAP), Maxime Marivain (CMAP)
https://arxiv.org/abs/2507.05775

Longest increasing subsequences for distributions with atoms, and an inhomogeneous Hammersley process
A famous result by Hammersley and Versik-Kerov states that the length $L_n$ of the longest increasing subsequence among $n$ iid continuous random variables grows like $2\sqrt{n}$. We investigate here the asymptotic behavior of $L_n$ for distributions with atoms. For purely discrete random variables, we characterize the asymptotic order of $L_n$ through a variational problem and provide explicit estimates for classical distributions. The proofs rely on a coupling with an inhomogeneous version of…

Orbital hybridization in graphene-based artificial atoms
Yue Mao, Hui-Ying Ren, Xiao-Feng Zhou, Hao Sheng, Yun-Hao Xiao, Yu-Chen Zhuang, Ya-Ning Ren, Lin He, Qing-Feng Sun
https://arxiv.org/abs/2509.04012

Orbital hybridization in graphene-based artificial atoms
Intraatomic orbital hybridization and interatomic bond formation are the two fundamental processes when real atoms are condensed to form matter. Artificial atoms mimic real atoms by demonstrating discrete energy levels attributable to quantum confinement. As such, they offer a solid-state analogue for simulating intraatomic orbital hybridization and interatomic bond formation. Signatures of interatomic bond formation has been extensively observed in various artificial atoms. However, direct evi…

Atomic Radial Correlation Energy Density Components
Ibrahim E. Awad, Abd Al-Aziz A. Abu-Saleh, Gurleen Cheema, Joshua W. Hollett, Raymond A. Poirier
https://arxiv.org/abs/2509.12580

Atomic Radial Correlation Energy Density Components
The components of the radial correlation energy density are calculated and analyzed for the atoms from He to Ar. The components include the nucleus-electron potential correlation energy density, the kinetic correlation energy density and the electron-electron potential correlation energy density. The necessary correlated one and two-electron density matrices are obtained from the Extrapolated-Full-Configuration-Interaction (exFCI) wave function where the reference wave function is restricted Ha…

Rotation Errors Due to Field Quantization for Simultaneously Driven Atoms
Hunter Lindemann, Shanon Vuglar, Julio Gea-Banacloche
https://arxiv.org/abs/2508.06769 https://

Rotation Errors Due to Field Quantization for Simultaneously Driven Atoms
When an electromagnetic field in a coherent or quasiclassical (e.g., squeezed) state is used to simultaneously drive an ensemble of two-level atoms, the quantum nature of the field will, in general, cause the final state of the atoms to differ from the one predicted for a totally classical field. This is a potential source of error in quantum logic gates in which the gate is the rotation of the atoms by a laser. In this paper, we use second order perturbation theory to find how this error scale…

Dual-species atomic absorption image reconstruction using deep neural networks
Kyuhwan Lee, Yong-il Shin
https://arxiv.org/abs/2508.12120 https://arxiv.org…

Dual-species atomic absorption image reconstruction using deep neural networks
Optical imaging plays an instrumental role in understanding the behavior of trapped neutral atoms. In this work, we describe a deep learning-based online image completion protocol that reduces interference fringes in optical absorption signals for a dual-species atomic system. Regardless of the distinct nature of the task for two different atomic species, 6Li and 23Na, the method displays a robust solution for suppressing fringes. To incorporate this into daily operations, a transfer learning s…

fullerene_structures: Fullerene molecular structures
Fifteen networks of carbon atoms and the atomic bonds that connect them within molecules of fullerenes, from 60 atoms up to 6000 atoms. A bond is defined to exist whenever the distance of two atoms is less than 1.5 angstrom.
This network has 240 nodes and 360 edges.
Tags: Biological, Chemical, Unweighted, Spatial

fullerene_structures: Fullerene molecular structures
Fifteen networks of carbon atoms and the atomic bonds that connect them within molecules of fullerenes, from 60 atoms up to 6000 atoms. A bond is defined to exist whenever the distance of two atoms is less than 1.5 angstrom.
This network has 4860 nodes and 7290 edges.
Tags: Biological, Chemical, Unweighted, Spatial

Magical Property of Fullerenes
Djordje Baralic, Adam Farhat
https://arxiv.org/abs/2508.07365 https://arxiv.org/pdf/2508.07365

Magical Property of Fullerenes
Fullerenes are an allotrope of carbon having hollow, cage-like structure. Atoms in the molecule are arranged in pentagonal and hexagonal rings, such that each atom is connected to three other atoms. Simple polyhedra having only pentagonal and hexagonal faces are a mathematical model for fullerenes. We say that a fullerene with $n$ vertices has magical property if the numbers $1, 2, \dots, n$ may be assigned to its vertices so that the sums of the numbers in each pentagonal faces are equal and t…

Gradient-Based Inverse Optimization of Atom-Chip Wire Currents for BEC Transport
Naoki Shibuya
https://arxiv.org/abs/2508.11712 https://arxiv.org/pdf/2508.…

Gradient-Based Inverse Optimization of Atom-Chip Wire Currents for BEC Transport
Modulating wire currents to shift a magnetic trap along an atom chip enables smooth contact-free delivery of Bose-Einstein condensates but can deform the confinement profile causing parametric heating and atom loss. We introduce a fast simulation framework based on inverse optimization that, given an initial trap and a predefined trajectory over time, computes a wire current schedule that transports the atoms and restores the trap geometry upon arrival. We assess trap's minimum energy, lateral …

Dipole condensates in synthetic rank-2 electric fields
Jiali Zhang, Wenhui Xu, Qi Zhou, Shaoliang Zhang
https://arxiv.org/abs/2509.14492 https://arxiv.org/…

Dipole condensates in synthetic rank-2 electric fields
Dipole condensates, formed from particle-hole pairs, represent a unique class of charge-neutral quantum fluids that evade conventional vector gauge fields, making their electrodynamic responses difficult to probe in natural materials. Here, we propose a tunable platform using strongly interacting two-component ultracold atoms to realize dipole condensates and probe their coupling to rank-2 electric fields. By applying spin-dependent forces and treating spin as a synthetic dimension, we engineer…

Vertex corrections and wavefunction renormalization for atoms, nuclei, and other heavy composite particles
Ryan Plestid, Mark B. Wise
https://arxiv.org/abs/2508.05540 https://…

Vertex corrections and wavefunction renormalization for atoms, nuclei, and other heavy composite particles
We study one-loop QED corrections to operator matrix elements involving heavy composite particles (e.g., heavy-mesons, nuclei, and atoms). We define a new notion of reducible and irreducible graphs which is useful for systems with many discrete excited states. The equivalence of the LSZ reduction formula and old fashioned perturbation theory is explicitly demonstrated. The self energy and vertex corrections are defined (to all orders), and the one-loop corrections are reduced to operator matrix…

Towards a fictitious magnetic field trap for both ground and Rydberg state $^{87}$Rb atoms via the evanescent field of an optical nanofibre
Alexey Vylegzhanin, Dylan J. Brown, Danil F. Kornovan, Etienne Brion, S\'ile Nic Chormaic
https://arxiv.org/abs/2507.12827

Strong antibunching photons/photon pairs emission in two atoms cavity QED system with the Van der Waals interaction
Zhouyang Yu, Jinping Xu, Chengjie Zhu, Zhengyang Bai, Yaping Yang
https://arxiv.org/abs/2509.11585

Strong antibunching photons/photon pairs emission in two atoms cavity QED system with the Van der Waals interaction
Weinvestigate the generation of antibunching photons and photon pairs in a two-atom cavity QED system leveraging interatomic van der Waals (vdW) interaction. We show that the vdW interaction shifts the two-atom excited state, enabling the suppression of two-photon excitation via destructive interference in a diamond configuration. This leads to antibunching photon emission with extremely high purity. Furthermore, by tuning the vdW interaction strength, the conditions for conventional …

Vibrational corrections to molecular properties including relativistic corrections at the level of the Zeroth-Order Regular Approximation
Louise M{\o}ller Jessen, Ronan Gleeson, Lars Hemmingsen, Stephan P. A. Sauer
https://arxiv.org/abs/2509.12412

Vibrational corrections to molecular properties including relativistic corrections at the level of the Zeroth-Order Regular Approximation
The vibrational averaging module of the Dalton Project was extended to work also with the Amsterdam Density Functional (ADF) program, making it possible to calculate vibrational corrections to properties and at the same time include a treatment of relativistic effects for heavier atoms at the level of the Zeroth-Order Regular Approximation (ZORA). To illustrate the importance of the relativistic contributions, zero-point vibrational corrections were calculated for the electric field gradient te…

Steady state diagram of interacting fermionic atoms coupled to dissipative cavities
Luisa Tolle, Ameneh Sheikhan, Thierry Giamarchi, Corinna Kollath, Catalin-Mihai Halati
https://arxiv.org/abs/2509.07469

Steady state diagram of interacting fermionic atoms coupled to dissipative cavities
We investigate fermionic atoms subjected to an optical lattice and coupled to a high finesse optical cavity with photon losses. A transverse pump beam introduces a coupling between the atoms and the cavity field. We explore the steady state phase diagram taking fluctuations around the mean-field of the atoms-cavity coupling into account. Our approach allows us to investigate both one- and higher-dimensional atomic systems. The fluctuations beyond mean-field lead to an effective temperature whic…

First-principles study of formic acid decomposition on single Pt atoms supported on heteroatom-doped graphene
Kazuma Sato, Norihito Sakaguchi, Yuji Kunisada
https://arxiv.org/abs/2509.07494

First-principles study of formic acid decomposition on single Pt atoms supported on heteroatom-doped graphene
Formic acid is a promising liquid hydrogen carrier, but its catalytic decomposition requires both high activity and selectivity toward dehydrogenation. Here, we investigated the catalytic activity and selectivity of formic acid decomposition on single Pt atoms supported on pristine and heteroatom-doped graphene using first-principles calculations based on the density functional theory. Reaction energy profiles reveal that single Pt atoms on P- and O-doped graphene show catalytic activity compar…

fullerene_structures: Fullerene molecular structures
Fifteen networks of carbon atoms and the atomic bonds that connect them within molecules of fullerenes, from 60 atoms up to 6000 atoms. A bond is defined to exist whenever the distance of two atoms is less than 1.5 angstrom.
This network has 720 nodes and 1080 edges.
Tags: Biological, Chemical, Unweighted, Spatial

An Orbit-qubit Quantum Processor of Ultracold Atoms
Ming-Gen He, Wei-Yong Zhang, Zhen-Sheng Yuan, Jian-Wei Pan
https://arxiv.org/abs/2509.10797 https://arx…

An Orbit-qubit Quantum Processor of Ultracold Atoms
It is challenging to build scalable quantum processors capable of both parallel control and local operation. As a promising platform to overcome this challenge, optical lattices offer exceptional parallelism. However, it has been struggling with precise local operations due to relatively narrow lattice spacings. Here, we introduce a new quantum processor incorporating orbit-qubit encoding and internal states (as auxiliary degrees of freedom) to achieve spatially selective operations together wi…

Master Equation for Quantum Self-Organization of Atoms and Molecules in Cavities
Tom Schmit, Catalin-Mihai Halati, Tobias Donner, Giovanna Morigi, Simon B. J\"ager
https://arxiv.org/abs/2508.07853

Master Equation for Quantum Self-Organization of Atoms and Molecules in Cavities
Quantum gases of atoms and molecules in optical cavities offer a formidable laboratory for studying the out-of-equilibrium dynamics of long-range interacting systems. Multiple scattering of cavity photons mediate interactions, and the emerging phases of matter are determined by the interplay of photon-mediated forces, dissipation, and quantum and thermal fluctuations. Control of these dynamics requires a detailed understanding of the mechanisms at play. Due to the number of degrees of freedom, …

Electron Ptychography Images Hydrogen Atom Superlattices and 3D Inhomogeneities in Palladium Hydride Nanoparticles
Zixiao Shi, Qihao Li, Himani Mishra, Desheng Ma, H\'ector D. Abru\~na, David A. Muller
https://arxiv.org/abs/2508.11142

Electron Ptychography Images Hydrogen Atom Superlattices and 3D Inhomogeneities in Palladium Hydride Nanoparticles
When hydrogen atoms occupy interstitial sites in metal lattices, they form metal hydrides (MHx), whose structural and electronic properties can differ significantly from the host metals. Owing to the small size of hydrogen atom and its unique interactions with the host metal, MHx is of broad interest in both fundamental science and technological applications. Determining where the hydrogen is located within the MHx, and whether it orders on the partially occupied interstitial sites is crucial f…

Local nanoscale probing of electron spins using NV centers in diamond
Sergei Trofimov, Christos Thessalonikios, Victor Deinhart, Alexander Spyrantis, Lucas Tsunaki, Kseniia Volkova, Katja H\"oflich, Boris Naydenon
https://arxiv.org/abs/2507.13295

Local nanoscale probing of electron spins using NV centers in diamond
Substitutional nitrogen atoms in a diamond crystal (P1 centers) are, on one hand, a resource for creation of nitrogen-vacancy (NV) centers, that have been widely employed as nanoscale quantum sensors. On the other hand, P1's electron spin is a source of paramagnetic noise that degrades the NV's performance by shortening its coherence time. Accurate quantification of nitrogen concentration is therefore essential for optimizing diamond-based quantum devices. However, bulk characterization methods…

How Trees on Atoms of Subset Algebras Define Minimal Forests and Their Growth
Vasily Buslov
https://arxiv.org/abs/2506.17921 https://…

How Trees on Atoms of Subset Algebras Define Minimal Forests and Their Growth
A complete description is given of how minimal trees on atoms of the algebra of subsets $\mathfrak{A}_k$ generated by minimal spanning $k$-component forests of a weighted digraph $V$ determine the form of these forests and how forests grow with increasing number of arcs (that is with a decrease in the number of trees). Precise bounds are established on what can be extracted about the tree structure of the original graph if the minimal trees on the atoms of a single algebra $\mathfrak{A}_k$ are …

Magnetic Triple-q State in Antiferromagnetic Monolayer Interfaced with Bismuthene
Chia-Ju Chen, Yu-Tung Lin, Chieh-Lin Lee, Nitin Kumar, Hung-Chin Lee, Yen-Hui Lin, Bo-Yao Wang, Stefan Bluegel, Gustav Bihlmayer, Pin-Jui Hsu
https://arxiv.org/abs/2507.12946

Magnetic Triple-q State in Antiferromagnetic Monolayer Interfaced with Bismuthene
We have successfully fabricated the bismuthene covered Mn monolayer on Ag(111) by evaporating Mn atoms onto (pxroot3)-Bi/Ag(111) at room temperature. By using spin-polarized scanning tunneling microscopy (SP-STM), we have resolved the magnetic triple-q (3Q) state. In combination with density-functional theory (DFT) calculations, the 3Q3-like spin texture is the magnetic ground state for the bismuthene covered Mn monolayer/Ag(111). Interestingly, the uniaxial magnetic anisotropy of 3Q3 state tri…

Bistability of optical properties of cesium vapor due to collective interaction of alignment and orientation under strong spin exchange conditions
M. V. Petrenko, A. K. Vershovskii
https://arxiv.org/abs/2509.10119

Bistability of optical properties of cesium vapor due to collective interaction of alignment and orientation under strong spin exchange conditions
Hydrogen-like alkali atoms with a single valence electron are the most common objects in quantum optics and, at the same time, serve as essential tools of the field. Under conditions of optical pumping, strong spin-exchange and ultra-weak magnetic field (spin-exchange relaxation free mode, SERF), ensembles of such atoms in the gas phase can demonstrate not only the absence of spin-exchange relaxation, but also nonlinear collective effects. We present experimental evidence that the alignment, i.…

Stochastic ion emission perturbation mechanisms in atom probe tomography: Linking simulations to experiment
Aslam Shaikh, Tero M\"akinen, Fran\c{c}ois Vurpillot, Mikko Alava, Ivan Lomakin
https://arxiv.org/abs/2509.13744

Stochastic ion emission perturbation mechanisms in atom probe tomography: Linking simulations to experiment
Field evaporation in atom probe tomography (APT) includes known processes related to surface migration of atoms, such as the so-called roll-up mechanism. They lead to trajectory aberrations and artefacts on the detector. These processes are usually neglected in simulations. The inclusion of such processes is crucial for providing reliable models for the development and verification of APT reconstruction algorithms, a key part of the whole methodology. Here we include stochastic lateral velocity…

Quantum criticality and nonequilibrium dynamics on a Lieb lattice of Rydberg atoms
Mark R. Hirsbrunner, Milan Kornja\v{c}a, Rhine Samajdar, Siva Darbha, Majd Hamdan, Jan Balewski, Ermal Rrapaj, Sheng-Tao Wang, Daan Camps, Fangli Liu, Pedro L. S. Lopes, Katherine Klymko
https://arxiv.org/abs/2508.05737

Quantum criticality and nonequilibrium dynamics on a Lieb lattice of Rydberg atoms
Neutral-atom quantum simulators offer a promising approach to the exploration of strongly interacting many-body systems, with applications spanning condensed matter, statistical mechanics, and high-energy physics. Through a combination of quantum experiments, numerical calculations, and analytical methods, we demonstrate a rich set of phenomena accessible on such quantum simulators by studying an array of Rydberg atoms placed on the Lieb lattice. First, we map out the ground states and phase di…

Collective dissipation engineering of interacting Rydberg atoms
Tao Chen, Chenxi Huang, Jacob P. Covey, Bryce Gadway
https://arxiv.org/abs/2509.06373 https://

Collective dissipation engineering of interacting Rydberg atoms
Engineered dissipation is emerging as an alternative tool for quantum state control, enabling high-fidelity preparation, transfer and stabilization, and access to novel phase transitions. We realize a tunable, state-resolved laser-induced loss channel for individual Rydberg atoms, in both non-interacting and strongly correlated settings. This capability allows us to reveal interaction-driven shifts of the exceptional point separating quantum Zeno and anti-Zeno regimes, and to demonstrate intera…

Quantum Phase Transition in the Dicke Model
Moorad Alexanian
https://arxiv.org/abs/2507.12332 https://arxiv.org/pdf/2507.12332…

Quantum Phase Transition in the Dicke Model
We consider a previously modified Jaynes-Cummings model with single-photon cavity radiation field and atomic system exchanging a squeezed photon and deduce a normal/superradiance quantum phase transition in the Dicke model of N atoms of arbitrary spin with independent co- and counter-rotating coupling terms.

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…

Attributed-graphs kernel implementation using local detuning of neutral-atoms Rydberg Hamiltonian
Mehdi Djellabi, Matthias Hecker, Shaheen Acheche
https://arxiv.org/abs/2509.09421

Attributed-graphs kernel implementation using local detuning of neutral-atoms Rydberg Hamiltonian
We extend the quantum-feature kernel framework, which relies on measurements of graph-dependent observables, along three directions. First, leveraging neutral-atom quantum processing units (QPUs), we introduce a scheme that incorporates attributed graphs by embedding edge features into atomic positions and node features into local detuning fields of a Rydberg Hamiltonian. We demonstrate both theoretically and empirically that local detuning enhances kernel expressiveness. Second, in addition to…

Sinusoidal Displacement Describes Disorder in CsPbBr3 Nanocrystal Superlattices
Umberto Filippi, Stefano Toso, Matheus G. Ferreira, Lorenzo Tallarini, Yurii P. Ivanov, Francesco Scattarella, Vahid Haghighat, Huaiyu Chen, Megan O. Hill Landberg, Giorgio Divitini, Jesper Wallentin, Cinzia Giannini, Liberato Manna, Dmitry Baranov
https://arxi…

Sinusoidal Displacement Describes Disorder in CsPbBr3 Nanocrystal Superlattices
Disorder is an intrinsic feature of all solids, from crystals of atoms to superlattices of colloidal nanoparticles. Unlike atomic crystals, in nanocrystal superlattices a single misplaced particle can affect the positions of neighbors over long distances, leading to cumulative disorder. This elusive form of collective particle displacement leaves clear signatures in diffraction, but little is known about how it accumulates and propagates throughout the superlattice. Here we rationalize propagat…

Quantum Walks on Arbitrary Spatial Networks with Rydberg Atoms
Gabriel Almeida, Raul Santos, Lara Janiurek, Yasser Omar
https://arxiv.org/abs/2507.21011 https://

Quantum Walks on Arbitrary Spatial Networks with Rydberg Atoms
Rydberg atoms provide a highly promising platform for quantum computation, leveraging their strong tunable interactions to encode and manipulate information in the electronic states of individual atoms. Key advantages of Rydberg atoms include scalability, reconfigurable connectivity, and native multi-qubit gates, making them particularly well-suited for addressing complex network problems. These problems can often be framed as graph-based tasks, which can be efficiently addressed using quantum …

Realizing the Haldane Model in Thermal Atoms
Jiefei Wang, Jianhao Dai, Ruosong Mao, Yunzhou Lu, Xiao Liu, Huizhu Hu, Shi-Yao Zhu, Xingqi Xu, Han Cai, Da-Wei Wang
https://arxiv.org/abs/2509.08411

Realizing the Haldane Model in Thermal Atoms
Topological materials hold great promise for developing next-generation devices with transport properties that remain resilient in the presence of local imperfections. However, their susceptibility to thermal noise has posed a major challenge. In particular, the Haldane model, a cornerstone in topological physics, generally requires cryogenic temperatures for experimental realization, limiting both the investigation of topologically robust quantum phenomena and their practical applications. In …

Multi-qubit Rydberg gates between distant atoms
Antonis Delakouras, Georgios Doultsinos, David Petrosyan
https://arxiv.org/abs/2507.16602 https://

Multi-qubit Rydberg gates between distant atoms
We propose an efficient protocol to realize multi-qubit gates in arrays of neutral atoms. The atoms encode qubits in the long-lived hyperfine sublevels of the ground electronic state. To realize the gate, we apply a global laser pulse to transfer the atoms to a Rydberg state with strong blockade interaction that suppresses simultaneous excitation of neighboring atoms arranged in a star-graph configuration. The number of Rydberg excitations, and thereby the parity of the resulting state, depends…

Lamb-Dicke Dynamics of Interacting Rydberg Atoms Coupled to the Motion of an Optical Tweezer Array
Aslam Parvej, Ludwig Mathey
https://arxiv.org/abs/2506.22669

Lamb-Dicke Dynamics of Interacting Rydberg Atoms Coupled to the Motion of an Optical Tweezer Array
Neutral Rydberg atoms trapped in optical tweezer arrays provide a platform for quantum simulation and computation. In this work, we investigate the Lamb-Dicke dynamics of coupled Rydberg atoms for different trapping frequencies. We model the atomic motion by both internal and motional degrees of freedom, in which the motional states arise due to the oscillation of each atom in optical tweezer traps due to the light-atom interaction. In this setup, the internal states are coupled to a laser ligh…

Formation of oriented polar molecules with a single shaped pulse
Murilo D. Forlevesi, Edson Denis Leonel, Emanuel F. de Lima
https://arxiv.org/abs/2509.11968 https://

Formation of oriented polar molecules with a single shaped pulse
We explore the possibility of forming a oriented polar molecule directly from a pair of colliding atoms. The process comprises the photoassociation and vibrational stabilization along with the molecular orientation. These processes are driven by a single time-dependent, linearly polarized control field and proceeds entirely within the electronic ground state, leveraging the presence of a permanent dipole moment. The control field is found by means of an optimal quantum control algorithm with a …

Approximate combinatorial optimization with Rydberg atoms: the barrier of interpretability
Christian de Correc, Thomas Ayral, Corentin Bertrand
https://arxiv.org/abs/2507.22761 …

Approximate combinatorial optimization with Rydberg atoms: the barrier of interpretability
Analog quantum computing with Rydberg atoms is seen as an avenue to solve hard graph optimization problems, because they naturally encode the Maximum Independent Set (MIS) problem on Unit-Disk (UD) graphs, a problem that admits rather efficient approximation schemes on classical computers. Going beyond UD-MIS to address generic graphs requires embedding schemes, typically with chains of ancilla atoms, and an interpretation algorithm to map results back to the original problem. However, interpre…

Tailoring interaction ranges in atom arrays
T. Botzung, G. Creutzer, C. Sayrin, J. Schachenmayer
https://arxiv.org/abs/2508.02815 https://arxiv.org/pdf/250…

Tailoring interaction ranges in atom arrays
We introduce a method to synthetically engineer the range of dipolar interactions in tweezer atom arrays by effectively modifying the modes of the electromagnetic vacuum with far-detuned relay atoms. We derive equations of motion for the atoms of interest after adiabatic elimination of the relay atoms. We show the effectiveness of the scheme for realistic experimental parameter regimes with circular and low-angular-momentum Rydberg atom states.

Testing Determinism and the Role of Time in Atoms
Mark G. Raizen
https://arxiv.org/abs/2507.01203 https://arxiv.org/pdf/2507.01203

Testing Determinism and the Role of Time in Atoms
We propose and analyze experiments to test determinism and the role of time in atoms. As a first step, we consider experiments to test if stable isotopes change over time. The idea is to measure the hyperfine splitting for newly created stable isotopes and compare them to the same isotopes found in nature. The three cases analyzed are strontium-87 with an odd number of neutrons, lutetium-175 with an odd number of protons, and lutetium-176 with an odd number of protons and neutrons. These experi…

Boosting Thermodynamic Efficiency with Quantum Coherence of Phaseonium Atoms
Federico Amato, Gerardo Adesso, Massimo G. Palma, Salvatore Lorenzo, Rosario Lo Franco
https://arxiv.org/abs/2509.02353

Boosting Thermodynamic Efficiency with Quantum Coherence of Phaseonium Atoms
We present a realistic implementation of a quantum engine powered by a phaseonium gas of coherently prepared three-level atoms -- where quantum coherence acts as a thermodynamic resource. Using a collision model framework for phaseonium-cavity interactions and cavity optomechanics, we construct a full engine cycle based on two non-thermal reservoirs, each characterized by coherence-induced effective temperatures. This configuration enhances the efficiency of a simple optomechanical engine opera…

Laser cooling and qubit measurements on a forbidden transition in neutral Cs atoms
J. Scott, H. M. Lim, U. Singla, Q. Meece, J. T. Choy, S. Kolkowitz, T. M. Graham, M. Saffman
https://arxiv.org/abs/2507.01720

Laser cooling and qubit measurements on a forbidden transition in neutral Cs atoms
We experimentally demonstrate background-free, hyperfine-level-selective measurements of individual Cs atoms by simultaneous cooling to $5.3~μ\rm K$ and imaging on the $6s_{1/2}\rightarrow 5d_{5/2}$ electric-quadrupole transition. We achieve hyperfine resolved detection with fidelity 0.9993(4) and atom retention of 0.9954(5), limited primarily by vacuum lifetime. Performing state measurements in a 3D cooling configuration enables repeated low loss measurements. A theoretical analysis of an ext…

No oscillating subradiant correlations in a strongly driven quantum emitter array
Jiaming Shi, Nikita Leppenen, Ran Tessler, Alexander N. Poddubny
https://arxiv.org/abs/2509.09993

No oscillating subradiant correlations in a strongly driven quantum emitter array
We theoretically study time-dependent correlations in a strongly driven array of $N$ two-level atoms, coupled to photons in a waveguide. We focus on the spectrum $\{λ\}$ of the Liouvillian superoperator, which determines the correlation decay rates $-\Re λ$ and the frequencies $\Imλ$. Our main finding is the suppression of subradiant oscillating correlations between atomic states by a strong coherent of amplitude $Ω$: $|\Re λ|\ge mγ/2$, where $γ$ is the single-atom spontaneous …

Confined few-particle systems beyond mean-field theory adopting Gaussian-type orbitals and Morse interparticle interaction
Matee ur Rehman, Paul Winter, Fabio Revuelta, Alejandro Saenz
https://arxiv.org/abs/2509.10347

Confined few-particle systems beyond mean-field theory adopting Gaussian-type orbitals and Morse interparticle interaction
Recent advancements in optical tweezers enable the trapping of arbitrary numbers of neutral atoms and molecules, even arrays of tweezers with variable geometry can be realized. These fascinating breakthroughs require novel full-dimensional beyond mean-field treatments for systems with more than two confined particles spread over traps that are arranged arbitrarily in space. In this work, the suitability of a quantum-chemistry inspired approach adopting Cartesian Gaussians as basis functions is …

Light Storage and Retrieval in an Atomic Tripod System
Shan Zhong, A. J. Sudler, D. Blume, Alberto M. Marino
https://arxiv.org/abs/2508.10220 https://arxiv…

Light Storage and Retrieval in an Atomic Tripod System
Highly-efficient quantum memories are essential for advancing quantum information processing technologies, including scalable quantum computing and quantum networks. We experimentally demonstrate a light storage and retrieval protocol in a tripod system using an ensemble of laser-cooled $^{87}$Rb atoms. The tripod system, which consists of three ground states and an excited state, offers rich dynamics: its use to coherently store and retrieve a weak probe pulse in the $^{87}$Rb $F=1$ ground sta…

Decoherence-free interaction and maximally entangled state generation in double-giant-atom semi-infinite waveguide systems
Jie Liu, Yue Cai, Lei Tan
https://arxiv.org/abs/2508.17616

Decoherence-free interaction and maximally entangled state generation in double-giant-atom semi-infinite waveguide systems
Giant atoms are artificial atoms that can couple to a waveguide non-locally. Previous work has shown that two giant atoms in a braided configuration can interact through a one-dimensional infinite waveguide, with both individual and collective atomic relaxation being fully suppressed. In this paper, however, we show that the decoherence-free interaction (DFI) between two giant atoms can be realized in both braided and nested configurations when the waveguide is semi-infinite. This protected int…

Fault tolerant Operations in Majorana-based Quantum Codes: Gates, Measurements and High Rate Constructions
Maryam Mudassar, Alexander Schuckert, Daniel Gottesman
https://arxiv.org/abs/2508.09928

Fault tolerant Operations in Majorana-based Quantum Codes: Gates, Measurements and High Rate Constructions
Majorana-based quantum computation in nanowires and neutral atoms has gained prominence as a promising platform to encode qubits and protect them against noise. In order to run computations reliably on such devices, a fully fault-tolerant scheme is needed for state preparation, gates, and measurements. However, current fault-tolerant schemes have either been limited to specific code families or have not been developed fully. In this work, we develop a general framework for fault-tolerant comput…

Replaced article(s) found for quant-ph. https://arxiv.org/list/quant-ph/new
[2/3]:
- Entanglement dynamics of Multi-Level Atoms embedded in Photonic Crystals: Leveraging Resonant Dip...
Nancy Ghangas, Shubhrangshu Dasgupta

Pulse-based optimization of quantum many-body states with Rydberg atoms in optical tweezer arrays
Kazuma Nagao, Sergi Juli\`a-Farr\'e, Joseph Vovrosh, Alexandre Dauphin, Seiji Yunoki
https://arxiv.org/abs/2507.19153

Pulse-based optimization of quantum many-body states with Rydberg atoms in optical tweezer arrays
We explore a pulse-based variational quantum eigensolver (VQE) algorithm for Rydberg atoms in optical tweezer arrays and evaluate its performance on prototypical quantum spin models. We numerically demonstrate that the ground states of the one-dimensional antiferromagnetic Heisenberg model and the mixed-field Ising model can be accurately prepared using an adaptive update algorithm that randomly segments pulse sequences, for systems of up to ten qubits. Furthermore, we propose and validate a hy…