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Physics

arXiv preprints from January 1, 2026 through September 23, 2026 — 14:46:32 EST

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Posted in astro-ph.GA · 2026-01-12 · M. Silvestrini, C. Tortora, V. Busillo, Alyson M. Brooks, A. Farahi, A. M. Garcia, N. Kallivayalil, N. R. Napolitano, J. C. Rose, P. Torrey, F. Villaescusa-Navarro, M. Vogelsberger

CASCO: Cosmological and AStrophysical parameters from Cosmological simulations and Observations IV. Testing warm dark matter cosmologies with galaxy scaling relations: A joint simulation-observation study using DREAMS simulations

Small-scale discrepancies in the standard Lambda cold dark matter paradigm have motivated the exploration of alternative dark matter (DM) models, such as warm dark matter (WDM). We investigate the constraining power of galaxy scaling relations on cosmological, astrophysical, and WDM parameters through a joint analysis of hydrodynamic...

💬 0 commentsarXiv:2601.07543v1PDF
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Posted in astro-ph.HE · 2026-01-12 · Zexi Niu, Ning-Chen Sun, Emmanouil Zapartas, Conor L. Ransome, Justyn R. Maund, Cesar Rojas-Bravo, Jifeng Liu

Revealing the diversity of Type IIn supernova progenitors through their environments

Type IIn supernovae (SNe IIn) are hydrogen-rich explosions embedded in dense circumstellar medium (CSM), which gives rise to their characteristic narrow hydrogen emission lines. The nature of their progenitors and pre-explosion mass loss remains, however, poorly understood. Using high-resolution Hubble Space Telescope (HST) imaging,...

💬 0 commentsarXiv:2601.07542v2PDF
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Posted in cond-mat.dis-nn · 2026-01-12 · Sven Lohmann, Quinn Emilia Fischer, Justus Leiber, Philipp Maass

Universal time-temperature scaling of conductivities in random site energy and associated random barrier model

Universal time-temperature scaling of conductivity spectra in disordered solids has been explained by thermally activated hopping of noninteracting particles over random energy barriers. An open problem is whether the random barrier model accounts for site energy disorder in real materials. Through mapping many-particle hopping in a...

💬 0 commentsarXiv:2601.07731v2PDF
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Posted in cond-mat.supr-con · 2026-01-12 · Luca Nashabeh, Liang Fu

Prediction of superconductivity in mass-asymmetric electron-hole bilayers

We study density-balanced, mass-asymmetric electron-hole bilayers as a tunable platform for correlated quantum phases. With independent control of carrier density and interlayer separation, the system exhibits a rich phase diagram, including exciton condensates, Wigner crystals, and for large hole-to-electron mass ratios, an...

💬 0 commentsarXiv:2601.07729v2PDF
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Posted in nucl-th · 2026-01-12 · N. K. Patra, Tuhin Malik, Kai Zhou, Constança Providência

Learning the relations between neutron star and nuclear matter properties with symbolic regression

The equation of state (EOS) of dense matter in neutron stars (NSs) remains uncertain, particularly at supra-nuclear densities where complex nuclear interactions and the potential presence of exotic matter, like hyperons, come into play. The complex relationships existing between nuclear matter and neutron star properties are...

💬 0 commentsarXiv:2601.07727v1PDF
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Posted in cond-mat.mtrl-sci · 2026-01-12 · Éric Cancès, Théo Duez, Jari van Gog, Asbjørn Bækgaard Lauritsen, Mathieu Lewin, Julien Toulouse

Geometric Time-Dependent Density Functional Theory

We provide a new formulation of Time-Dependent Density Functional Theory (TDDFT) based on the geometric structure of the set of states constrained to have a fixed density. Orbital-free TDDFT is formulated using a hydrodynamics equation involving a new density-to-current functional map. In the corresponding Kohn--Sham equation, the...

💬 0 commentsarXiv:2601.07724v3PDF
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Posted in nucl-th · 2026-01-12 · Vishal Parmar, Ignazio Bombaci

Multi-Physics Bayesian Analysis of Neutron Star Crust Using Relativistic Mean-Field Model

We study the properties of neutron-star crust within a Bayesian framework based on a unified relativistic mean-field (RMF) description of dense matter. The analysis focuses on the posterior distributions of crust properties, constrained by nuclear experimental data, chiral effective field theory, and multimessenger neutron-star...

💬 0 commentsarXiv:2601.07722v1PDF
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Posted in cond-mat.mtrl-sci · 2026-01-12 · Eric Cancès, Théo Duez, Jari van Gog, Asbjørn Bækgaard Lauritsen, Mathieu Lewin, Julien Toulouse

Geometric theory of constrained Schrödinger dynamics with application to time-dependent density-functional theory on a finite lattice

Time-dependent density-functional theory (TDDFT) is a central tool for studying the dynamical electronic structure of molecules and solids, yet aspects of its mathematical foundations remain insufficiently understood. In this work, we revisit the foundations of TDDFT within a finite-dimensional setting by developing a general...

💬 0 commentsarXiv:2601.07719v3PDF
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Posted in cond-mat.mes-hall · 2026-01-12 · D. Zambrano, C. D. Núñez, P. A. Orellana, J. P. Ramos-Andrade, L. Rosales

Effects of random vacancies on the spin-dependent thermoelectric properties of silicene nanoribbon

The spin-dependent thermoelectric properties of silicene nanoribbon heterostructures are investigated, in which the central conductor contains a random distribution of vacancies and is connected to two pristine leads of the same material, placed in proximity to ferromagnetic insulators. The magnetic moments of the leads are analyzed...

💬 0 commentsarXiv:2601.07717v1PDF
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Posted in astro-ph.CO · 2026-01-12 · Raphael Picard

Induced gravitational waves -- beyond linear cosmological perturbation theory

This thesis focuses on gravitational waves (GWs) that arise beyond linear order in cosmological perturbation theory. In recent years, scalar-induced GWs have attracted significant attention because they may serve as the observational signature of primordial black holes (PBHs) formed in the early universe. The formation of PBHs...

💬 0 commentsarXiv:2601.07716v1PDF
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Posted in cond-mat.supr-con · 2026-01-12 · R. Pons, M. Flavenot, K. Fürsich, E. Schierle, E. Weschke, M. R. Cantarino, E. Goering, P. Nagel, S. Schuppler, G. Kim, G. Logvenov, B. Keimer, R. J. Green, D. Preziosi, E. Benckiser

From perovskite to infinite-layer nickelates: hole concentration from x-ray absorption

The difficulty of determining cation concentrations and oxygen stoichiometry in infinite-layer nickelate thin films has so far prevented clear experimental identification of the nickel electron configuration in the superconducting phase. We used soft x-ray absorption spectroscopy to study the successive changes in PrNiO$_x$ thin films...

💬 0 commentsarXiv:2601.07710v2PDF
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Posted in physics.optics · 2026-01-12 · Ali Pirmoradi, Zhehao Yu, Amirreza Shoobi, Geun Ho Ahn, Jelena Vučković, Firooz Aflatouni

Single-Chip 1.024 Tb/s Optical Receiver for High-Speed Optical links

Integrated optical transceivers, utilizing wavelength-division-multiplexing, offer a path forward for implementation of compact, high-bandwidth and energy-efficient interconnects for future data centers. Here we report the demonstration of a monolithically integrated optical receiver in 45nm CMOS, where efficient multi-layer optical...

💬 0 commentsarXiv:2601.07709v1PDF
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Posted in astro-ph.IM · 2026-01-12 · Anthony Mallama, Richard E. Cole, Hui Zhi, Brad Young, Jay Respler, Olga Zamora, Michelle Dadighat

Brightness Characterization and Modeling for Amazon Leo Satellites

The mean apparent magnitude of Amazon Leo satellites is 6.28 based on 1,938 observations. For spacecraft in their operational mode, 92% exceeded the brightness limit recommended by the IAU for interference with research, while 25% distract from aesthetic appreciation of the night sky. The reflective characteristics are similar to...

💬 0 commentsarXiv:2601.07708v1PDF
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Posted in quant-ph · 2026-01-12 · Andrew Haverly, Shahram Rahimi, Mark A. Novotny

Assembly to Quantum Compiler

This research presents a novel approach in quantum computing by transforming ARM assembly instructions for use in quantum algorithms. The core achievement is the development of a method to directly map the ARM assembly language, a staple in classical computing, to quantum computing paradigms. The practical application of this...

💬 0 commentsarXiv:2601.07706v1PDF
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Posted in cond-mat.mtrl-sci · 2026-01-12 · Jakub Šebesta, Dominik Legut

Spin-lattice model simulations of tetragonal FePt system

Magnetic materials play a key role in the contemporary industry, providing unique features with a wide application potential. To study physical phenomena and design new materials, it is important to possess an appropriate tool, a model allowing simulation of desired behavior. Spin-lattice model simulations can be used to investigate...

💬 0 commentsarXiv:2601.07703v1PDF
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Posted in cond-mat.mtrl-sci · 2026-01-12 · William Thornley, Sam Sullivan-Allsop, Rongsheng Cai, Nick Clark, Roman Gorbachev, Sarah J. Haigh

Noise2Void for Denoising Atomic Resolution Scanning Transmission Electron Microscopy Images

The Noise2Void technique is demonstrated for successful denoising of atomic-resolution scanning transmission electron microscopy (STEM) images. The technique is applied to denoising atomic resolution images and videos of gold adatoms on a graphene surface within a graphene liquid cell, with the denoised experimental data qualitatively...

💬 0 commentsarXiv:2601.07699v1PDF
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Posted in quant-ph · 2026-01-12 · Ramandeep Dewan

Finite-Memory Extension of Tegmark's Decoherence Bound in Biological Media

Tegmark's decoherence bound is derived under the assumption of a strictly memoryless environment. We show that this result corresponds to the singular limit of a finite-memory theory. For exponentially correlated environments decoherence is generically quadratic at short times and the decoherence time scales as the square root of the...

💬 0 commentsarXiv:2601.07689v2PDF
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Posted in astro-ph.HE · 2026-01-12 · Zheng-Hang Yu, Chen-Wei Wang, Shao-Lin Xiong, Shuang-Xi Yi, Wen-Long Zhang, Wen-Jun Tan, Yan-Qiu Zhang, Chao Zheng, Hao-Xuan Guo, Jia-Cong Liu, Yang-Zhao Ren, Yue Wang, Sheng-Lun Xie, Wang-Chen Xue, Jin-Peng Zhang, Peng Zhang, Zheng-Hua An, Ce Cai, Pei-Yi Feng, Min Gao, Ke Gong, Dongya Guo, Yue Huang, Bing Li, Cheng-Kui Li, Xiao-Bo Li, Xin-Qiao Li, Ya-Qing Liu, Xiao-Jing Liu, Xiang Ma, Wenxi Peng, Rui Qiao, Li-Ming Song, Jin Wang, Jin-Zhou Wang, Ping Wang, Xiang-Yang Wen, Shuo Xiao, Sheng Yang, Shu-Xu Yi, Qi-Bin Yi, Da-Li Zhang, Fan Zhang, Shuang-Nan Zhang, Yan-Ting Zhang, Zhen Zhang, Xiao-Yun Zhao, Yi Zhao, Shi-Jie Zheng

Brightest GRB flare observed in GRB 221009A: bridge the last gap between flare and prompt emission in GRB

Flares are usually observed during the afterglow phase of Gamma-Ray Bursts (GRBs) in soft X-ray, optical and radio bands, but rarely in gamma-ray band. Despite the extraordinary brightness, GECAM-C has accurately measured both the bright prompt emission and flare emission of GRB 221009A without instrumental effects, offering a good...

💬 0 commentsarXiv:2601.07688v2PDF
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Posted in quant-ph · 2026-01-12 · Carlos Ernesto Lopetegui-González, Gaël Massé, Enky Oudot, Uta Isabella Meyer, Federico Centrone, Frédéric Grosshans, Pierre-Emmanuel Emeriau, Ulysse Chabaud, Mattia Walschaers

A unified framework for Bell inequalities from continuous-variable contextuality

Although the original EPR paradox was formulated in terms of position and momentum, most studies of these phenomena have focused on measurement scenarios with only a discrete number of possible measurement outcomes. Here, we present a framework for studying non-locality that is agnostic to the dimension of the physical systems...

💬 0 commentsarXiv:2601.07686v1PDF
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Posted in quant-ph · 2026-01-12 · Akash Halder, Amlan K. Roy, Debraj Nath

Quantum information and statistical complexity of hydrogen-like ions in Dunkl-Schrödinger system

In this work, we present analytical solutions of Schrödinger equation for Coulomb potential in presence of a Dunkl reflection operator. Expressions are offered for eigenvalues, eigenfunctions and radial densities for H-isoelectronic series (Z=1-3). The degeneracy in energy in absence and presence of the reflection has been discussed....

💬 0 commentsarXiv:2601.07683v1PDF
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Posted in physics.ins-det · 2026-01-12 · Emiliya Poghosyan, Xiangyu Xie, Joakim Reuteler, Kirsty A. Paton, Luis Barba Flores, Benjamin Béjar Haro, Erik Fröjdh, Anna Bergamaschi, Elisabeth Müller

Sub-Pixel Electron Beam Alignment for Machine Learning Characterization of Hybrid Pixel Detectors

Due to their radiation hardness, kilohertz frame rates, and high dynamic range, hybrid pixel detectors have recently expanded their application range to electron diffraction and recently also electron imaging. However, these detectors typically have pixel sizes about ten times larger than those of direct electron detectors commonly...

💬 0 commentsarXiv:2601.07682v1PDF
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Posted in cond-mat.mtrl-sci · 2026-01-12 · John Bolin, Amanda Goold, Olof Hildeberg, Alva Limbäck, Elsebeth Schröder

A density functional theory study of amino acids on Mg and Mg-based alloys

Magnesium (Mg) has mechanical properties similar to bone tissue, and Mg ions take part in the metabolism. This makes Mg of interest for biocompatible degradable body implants, provided that its high corrosion rate can be inhibited. Slightly alloying Mg and adding surface coatings can slow down the corrosion processes without...

💬 0 commentsarXiv:2601.07680v1PDF
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Posted in quant-ph · 2026-01-12 · Dorian Schiffer, Robert Kindler, Alexandra Bergmayr-Mann, Florian Kanitschar, Amin Babazadeh, Paul Erker, Marcus Huber, Anton Zeilinger

Bright Source of High-Dimensional Temporal Entanglement

High-dimensional entanglement is considered to hold great potential for quantum key distribution (QKD) in high-loss and -noise scenarios. To harness its robustness, we construct a source for high-dimensional time-bin entangled photons optimized for high brightness, low complexity, and long-term stability. We certify the generated...

💬 0 commentsarXiv:2601.07678v1PDF
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Posted in physics.optics · 2026-01-12 · Shuang Li, Yibing Wang, Yu Zhang, Changhui Li

Analytical Expression for Spherically Symmetric Photoacoustic Sources: A Unified General Solution (Theoretical Analysis and Derivation)

Here we present a comprehensive derivation of the analytical expression for the spatiotemporal acoustic pressure generated by photoacoustic sources with spherically symmetric initial pressure distributions. Starting from the fundamental photoacoustic wave equation, we derive a unified analytical solution applicable to arbitrary...

💬 0 commentsarXiv:2602.23375v1PDF