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Physics

arXiv preprints from January 1, 2026 through September 6, 2026 — 01:51:18 EST

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Posted in cond-mat.mes-hall · 2026-07-20 · Hernan Aguirre, Hernan L. Calvo, Eduardo M. Perassi

Position-dependent tight-binding model for Li impurities in monolayer and bilayer graphene

Lithium adsorption and intercalation can significantly modify the low-energy electronic properties of graphene-based materials, making their characterization relevant for understanding Li-ion transport and storage in graphitic electrodes. In this work, we investigate the electronic structure of a Li ion adsorbed on monolayer graphene...

💬 0 commentsarXiv:2607.18214v1PDF
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Posted in cond-mat.mes-hall · 2026-07-20 · Jackson Kuklin, Ning Mao, Milan Mandigo-Stoba, Edgar Elias, Tianci Song, Connor Engel, Pola Pietrzkowski, Kenji Watanabe, Takashi Taniguchi, Daniel Rhodes, Yang Zhang, Qianhui Shi

Contrasting $Γ$- and K-Valley Moiré Physics in Twisted Monolayer/Bilayer WSe$_2$

Electronic orbital character plays a central role in determining electronic correlations, spin-orbit coupling, dimensionality, and ultimately the quantum phases of condensed-matter systems. Two-dimensional moiré materials have emerged as highly tunable platforms for exploring correlated phenomena, but the role of orbital degrees of...

💬 0 commentsarXiv:2607.18212v1PDF
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Posted in nucl-th · 2026-07-20 · Rutik Manikandhan, Rohit Gupta, Rene Bellwied

Sensitivity of p_T Fluctuations to the QCD Equation of State

We construct a novel theoretical baseline for dynamical transverse momentum correlations, $C_{pT}$, across a wide range of collision energies spanning the RHIC Beam Energy Scan (BES) program. For the first time, a unified framework is developed to describe the energy and centrality dependence of $C_{p_{\rm T}}$ from...

💬 0 commentsarXiv:2607.18211v1PDF
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Posted in cond-mat.soft · 2026-07-20 · B. N. J. Persson

Plastic smoothing of rough surfaces

When two metal blocks are squeezed together the stresses in the asperity contact regions are usually so large that the asperities deform plastically, at least at short length scales. Many tribology properties of contacts, such as the contact stiffness and the electric and thermal contact resistance, and the fluid flow at interfaces,...

💬 0 commentsarXiv:2607.18208v1PDF
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Posted in astro-ph.CO · 2026-07-20 · Gláuber C. Dorsch, Marek Lewicki, Daniel A. Pinto

Benchmarking wall velocities in cosmological phase transitions: Fluid Ansatz and WallGo

A reliable computation of the bubble wall velocity during a cosmological phase transition requires an adequate modeling of the non-equilibrium dynamics in the vicinity of this expanding bubble. This task can be made computationally faster by imposing an \emph{Ansatz} on the shape of the non-equilibrium particle distribution function,...

💬 0 commentsarXiv:2607.18207v1PDF
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Posted in quant-ph · 2026-07-20 · Pan Gao, Xu-Sheng Xu, Ji-Ze Han, Jing-Wei Wen, Ling Qian, Xu-Dong Lv, Run-Qing Zhang, Xiao-Xiao Hu, Gui-Lu Long

QuantiSpect: A Structure-Aware Lightweight 3D CNN Pre-Decoder for Scalable Surface Code Quantum Error Correction

Real-time decoding is a critical bottleneck for large-scale fault-tolerant quantum computing. AI-based neural pre-decoders locally correct most physical errors before passing residual syndromes to a global decoder, enabling sub-microsecond latencies. However, existing architectures carry significant overhead from dense 3D...

💬 0 commentsarXiv:2607.18204v1PDF
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Posted in physics.plasm-ph · 2026-07-20 · Richard Fitzpatrick

Equilibrium of a Rapidly Rotating Axisymmetric Magnetic Mirror Machine

A recent paper [Hazeltine, et al., Phys. Plasmas 33, 072501 (2026)] has questioned whether the standard result, (ultimately) due to Ferraro, that the plasma angular velocity is approximately constant along individual equilibrium magnetic field-lines in a rotating axisymmetric magnetic mirror machine, continues to hold when the...

💬 0 commentsarXiv:2607.18203v1PDF
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Posted in math-ph · 2026-07-20 · Timothy Chumley, Renato Feres, Zhenyi Zhang

Entropy production in Knudsen thermodynamics of compartmented systems

We investigate entropy production and nonequilibrium transport in a class of random dynamical systems modeling a Knudsen gas confined to a compartmented container. The system consists of a single particle undergoing random billiard motion, with collisions leading to random reflection or transmission through semi-reflecting,...

💬 0 commentsarXiv:2607.18202v1PDF
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Posted in astro-ph.EP · 2026-07-20 · Anselmo Falorca, Aline Vidotto

A Self-Consistent 3D Hydrodynamic Model for Helium Transit Signatures in Evaporating Hot Jupiters

The HeI triplet line (1083 nm), together with hydrodynamic models, can be used to characterize atmospheric escape of exoplanets. However, most of the available models cannot capture the three dimensional (3D) physics of escaping atmospheres, such as tidal forces and the interaction with stellar winds. To investigate how 3D effects...

💬 0 commentsarXiv:2607.18193v1PDF
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Posted in hep-ph · 2026-07-20 · María Olalla Olea-Romacho

Wide binaries in ultra-faint dwarf galaxies as a probe of extended dark objects

Wide stellar binaries are sensitive dynamical probes of dark matter substructure. We generalize existing point-mass disruption constraints to spherical extended dark objects and apply the resulting framework to the population of wide-binary candidates identified in the ultra-faint dwarf galaxy Bootes I. We derive 95% confidence limits...

💬 0 commentsarXiv:2607.18185v1PDF
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Posted in physics.comp-ph · 2026-07-20 · Sandy Hardian Susanto Herho, Dasapta Erwin Irawan, Agus Wahyu Jatmiko, Sito Fossy Biosa, Candrasa Surya Dharma, Edi Riawan, Astyka Pamumpuni, Rendy Dwi Kartiko, Rusmawan Suwarman, Deny Juanda Puradimaja

anyakrakusuma: A Python Library for Entropic Schrödinger Bridges on Idealized Geometries

We present anyakrakusuma, an open-source Python library that solves the discrete static Schrödinger bridge problem, the entropically regularized counterpart of optimal transport, through a log-domain Sinkhorn--Knopp iteration and reconstructs the entropic interpolation between two empirical point clouds. The solver is paired with a...

💬 0 commentsarXiv:2607.18184v1PDF
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Posted in cond-mat.mtrl-sci · 2026-07-20 · Carlos Betancur, Gianluca Stefanucci, Enrico Perfetto

Excitonic effects in the photocarriers dynamics of two-dimensional materials

We investigate the role of excitonic correlations in shaping the ultrafast dynamics of photoexcited carriers in semiconductors. Conventional approaches describe relaxation within single-particle frameworks, where electron-electron and electron-phonon scattering drive thermalization toward Fermi-Dirac distributions, neglecting...

💬 0 commentsarXiv:2607.18183v1PDF
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Posted in cond-mat.mtrl-sci · 2026-07-20 · Bo Han, Jianchuan Wang, Rui Zhang, Martin Matas, Elias Vigl, Jing Tang, Yong Du, Christian Weiss, David Holec

Machine Learning Potential-Driven Molecular Dynamics Simulations of Dehydrogenation in Pristine and Doped MgH$_2$

Machine learning potential-driven molecular dynamics simulations (ML-MD) were employed to provide atomistic insights into the dehydrogenation kinetics of pristine and doped MgH2. Through systematic investigation of distinct surface orientations, the MgH2 (100) surface was identified as the most active low-index surface for hydrogen...

💬 0 commentsarXiv:2607.18182v1PDF
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Posted in quant-ph · 2026-07-20 · Ahatesham Bhuiyan, Cheng Chu, Qian Lou, Mengxin Zheng

Hardware Robustness of Sample-Based Quantum Diagonalization

Sample-based Quantum Diagonalization (SQD) is a hybrid quantum-classical method that replaces variational optimization with a self-consistent recovery loop over QPU samples. Although SQD is considered robust to noisy samples and imperfect classical inputs, its robustness across practical deployment choices has not been systematically...

💬 0 commentsarXiv:2607.18196v1PDF
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Posted in physics.hist-ph · 2026-07-10 · Rasmus Jaksland

Spacetime from Entanglement: The Emergence of Metric, Gravity, or Topology

In AdS/CFT, one often finds claims along the lines that ``spacetime emerges from entanglement." This paper argues that behind these general statements hide three distinct emergence claims about, respectively, metric, gravitational dynamics, and topological connectivity. Thus, despite being advertised with the same terminology, these...

💬 1 commentsarXiv:2607.09823v1PDF
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Posted in astro-ph.GA · 2026-07-16 · Kerwann Tep, Douglas C. Heggie

Discrepancies between Chandrasekhar's theory of relaxation and $N$-body simulations

Globular clusters are systems which are known to be particularly well described by two-body relaxation. In recent decades many studies have shown that Chandrasekhar's orbit-averaged theory is able to reproduce many features of numerical simulations. However, it has been claimed that differences between the theory and simulation...

💬 1 commentsarXiv:2607.14844v1PDF
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Posted in astro-ph.GA · 2026-07-13 · Christa DeCoursey, Christian Vassallo, Louis-Gregory Strolger, Justin D. R. Pierel, Eiichi Egami, Seppo Mattila, Armin Rest, David A. Coulter, Andrew J. Bunker, Alex J. Cameron, James M. DerKacy, Daniel J. Eisenstein, Michael Engesser, Ori D. Fox, Sebastian Gomez, Massimo Griggio, Kevin Hainline, Ryan Hausen, Zhiyuan Ji, Benjamin D. Johnson, Roberto Maiolino, Takashi J. Moriya, Brant Robertson, Koji Shukawa, Matthew R. Siebert, Fengwu Sun, Sandro Tacchella, Christina C. Williams, Christopher N. A. Willmer, Yossef Zenati

The JADES Transient Survey II: Volumetric Supernova Rates out to z~5

The JADES Transient Survey (JTS) identified 83 supernova (SN) candidates in the JADES Deep Field, a $\sim$25 arcmin$^2$ region with deep ($\sim$30 mag) multi-band, multi-epoch JWST/NIRCam coverage. We use this sample to derive the first volumetric core-collapse (CC) SN and Type Ia (SN Ia) rates in the $z$$\sim$2-5 range. Many of these...

💬 1 commentsarXiv:2607.12018v1PDF
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Posted in hep-ph · 2026-07-07 · Sayantan Chakraborty, Yash Dadhwal, Arun M. Thalapillil

The Positivity Geometry of Photon--Dark-Photon Effective Field Theories

We derive positivity bounds on the complete dimension-eight effective field theory of photons and a massless dark photon. The mixed gauge sector contains twelve CP-even Wilson coefficients and an enlarged helicity-amplitude structure. Using a modified forward-limit dispersion relation, we analytically obtain non-trivial linear and...

💬 1 commentsarXiv:2607.06658v1PDF
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Posted in astro-ph.IM · 2026-07-16 · Nitish Singh, S Sriram, Jurgen Schmoll, Bharat Kumar Yerra

Design and Development of a Lab Prototype of a Fiber-Based Integral Field Spectrograph

Integral Field Spectroscopy provides simultaneous spatial and spectral information, making it a powerful technique for studying both point like and extended astronomical sources. As part of our effort to develop a compact Integral Field Spectrograph (IFS) for optical astronomy, we have designed and realized a fiber based prototype...

💬 1 commentsarXiv:2607.14546v1PDF
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Posted in quant-ph · 2026-07-13 · Xinzhao Wang, Shuo Zhou, Ziruo Wang, Pei Zeng, Jinzhao Sun, Qi Zhao, Tom Gur, Tongyang Li

Trotter error compensation with polylogarithmic precision and nested-commutator scaling without ancillas

Product formulas are among the most practical approaches to Hamiltonian simulation, requiring no ancillary qubits and exhibiting error bounds governed by nested commutators rather than only by Hamiltonian norms. Their circuit size, however, scales polynomially with the inverse precision. We develop a high-order nested-commutator...

💬 1 commentsarXiv:2607.11856v1PDF
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Posted in cond-mat.str-el · 2026-07-07 · Abhigya Rangari, Manna Paul, Sayandip Ghosh

Weak-coupling altermagnetism and chiral magnetic excitations in a checkerboard lattice

Altermagnets, characterized by spin-split electronic bands with compensated magnetic moments, have emerged as a new class of magnetic materials garnering attention in recent years. Here, using a minimal one-band Hubbard model, we show that the checkerboard lattice serves as a natural platform for altermagnetism for electrons. The...

💬 1 commentsarXiv:2607.06106v1PDF
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Posted in physics.optics · 2026-07-07 · J. Sumaya-Martinez, A. Altamirano-Torres

Sectorial customized corneal crosslinking for keratoconus: an inverse biomechanical design study with an anisotropic reduced shell finite-element surrogate

We propose an inverse biomechanical design framework for sectorial customized corneal crosslinking in keratoconus. The cornea is modeled as an anisotropic reduced shell with spatially varying crosslinking-induced stiffening, enabling the optimization of localized treatment patterns rather than uniform irradiation profiles. Numerical...

💬 1 commentsarXiv:2607.06385v1PDF
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Posted in quant-ph · 2026-07-17 · Chun-Yang Luan, Haiyu Ding, Cheng-Kang Pan, Xiangjie Li, Lin Cheng, Gangxi Wang, Yuting Lei, Peilin Zheng, Shixin Hu, Xiang Zhang, Fei Wang

Boundary-Phase Control of Sequentially Addressed Trapped-Ion ZZ Interactions

Motion-mediated trapped-ion gates typically apply synchronized state-dependent forces to both target ions. We consider the complementary setting in which one addressing channel alternates between the targets, so their force windows do not overlap. In a complex-amplitude near-resonant description, each window generates a displacement...

💬 1 commentsarXiv:2607.15688v1PDF
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Posted in physics.bio-ph · 2026-07-08 · Eli Yovel, Noy Cohen

Stiffness by design in biological fibers: the influence of microstructure and temperature

Biological fibers exhibit exceptional mechanical properties such as high stiffness, toughness, and elasticity. The stiffness of bio-fibers is governed by a hierarchical microstructure that is highly sensitive to the extraction method, post-processing, and environmental factors such as temperature. Commonly, the microstructure features...

💬 0 commentsarXiv:2607.07377v1PDF
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Posted in astro-ph.SR · 2026-07-14 · K. Deshmukh, L. Mahy, H. Sana, A. J. Frost, E. Gosset, C. Lanthermann, J. -B. LeBouquin, D. Pauli, T. Shenar

Southern massive stars at high angular resolution: WR 25 is a massive hierarchical triple system

WR 25 is a massive colliding-wind binary in the Carina nebula comprising a WN6ha primary with an O5 companion in an eccentric 208-d orbit. Recent spectroscopic analysis estimates the total binary mass to approach $100\,M_\odot$, and a primary-to-secondary mass ratio of $q= M_1/M_2\approx2$. The presence of additional spectroscopic...

💬 0 commentsarXiv:2607.12836v1PDF