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Physics

arXiv preprints from January 1, 2026 through September 24, 2026 — 14:48:09 EST

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Posted in astro-ph.SR · 2026-01-01 · Alexander I. Shapiro Nadiia Kostogryz Sara Seager Veronika Witzke Julien de Wit Valeriy Vasilyev Astrid M. Veronig Robert Cameron Hardi Peter Sami K. Solanki

Molecular hydrogen controls the temperatures of flares on TRAPPIST-1

Early JWST observations of TRAPPIST-1 have revealed an unexpected puzzle: energetic white-light flares ($\rm{E} > 10^{30}$ erg) reach temperatures of only ${\sim}$3500--4000\,K, nearly three times cooler than typical solar flares, which peak around 9000--10000\,K. Here we explain this difference by identifying the physical mechanism...

💬 0 commentsarXiv:2601.00386v1PDF
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Posted in quant-ph · 2026-01-01 · Xian Shi

Probabilistic Entanglement Distillation: Error Exponents via Postselected Quantum Hypothesis Testing Against Separable States

Entanglement distillation and entanglement cost are fundamental tasks in quantum entanglement theory. This work studies both in the probabilistic setting and focuses on the asymptotic error exponent of probabilistic entanglement distillation when the operational model is $δ$-approximately nonentangling or $δ$-approximately dually...

💬 0 commentsarXiv:2601.00383v2PDF
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Posted in hep-ph · 2026-01-01 · Kamil Mudrunka, Kazunori Nakayama

High Frequency Spectrum of Primordial Gravitational Waves

During inflation long wavelength gravitational waves are produced, which form stochastic background in the present universe with very wide range of frequencies. Higher frequency gravitational waves never experience super-Hubble-radius regime, but they are also amplified after inflation due to the inflaton oscillation. Taking account...

💬 0 commentsarXiv:2601.00378v2PDF
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Posted in astro-ph.SR · 2026-01-01 · Andreas A. C. Sander

Open Questions in Massive Star Research across Cosmic Scales

Massive stars are the engines of the Cosmos, shaping their environments and driving galaxy evolution across cosmic time. Yet, this general textbook picture faces many challenges when trying to turn abstract insights into quantitative predictions. Recent discoveries, such the surprisingly high metallicity and early nitrogen enrichment...

💬 0 commentsarXiv:2601.00373v1PDF
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Posted in physics.plasm-ph · 2026-01-01 · Mücahid Akbas

Influence of Cathode Boundary and Initial Electron Swarm Width on Electron Swarm Parameter Determination with the Pulsed Townsend Experiment

The Pulsed Townsend experiment enables the extraction of relevant electron transport properties in different gases such as the electron drift velocity $W$ (or equivalently the mobility $μ$), the longitudinal diffusion coefficient $D_{\mathrm{L}}$, and the effective ionization rate $R_{\mathrm{net}}$ (or equivalently the effective...

💬 0 commentsarXiv:2601.00365v4PDF
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Posted in cond-mat.mes-hall · 2026-01-01 · Adarsh Hullahalli, Christos Panagopoulos, Christina Psaroudaki

Magnon Superlattices around Skyrmions in Frustrated Magnets

Dynamic and stable magnetic textures offer a powerful platform for controlling magnon states in the broader context of spin electronics. In this work, we uncover a novel class of dynamical, crystal-like localization patterns in real space, arising from the hybridization of magnons with topologically non-trivial spin textures that...

💬 0 commentsarXiv:2601.00363v1PDF
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Posted in astro-ph.SR · 2026-01-01 · Albert M. Varonov, Todor M. Mishonov

On the Theory of Absorption of Sound Waves via the Bulk Viscosity in the Partially Ionized Solar Chromosphere

Bulk viscosity and thermodynamic variables of a hydrogen-helium cocktail: internal energy, enthalpy, pressure, their derivatives, heat capacities per constant density and pressure are obtained using temperature and density height profiles of the solar atmosphere [Avrett & Loeser, ApJS Vol. 175, 229 (2008)]. The qualitative evaluation...

💬 0 commentsarXiv:2601.00362v1PDF
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Posted in physics.soc-ph · 2026-01-01 · Malik Dongla, Mohamed Khalafalla

Modeling Policy and Resource Dynamics in the Construction Sector of Developing Countries: A System Dynamics Approach Using Sudan as a Case Study

Construction industries in developing countries face systemic challenges such as chronic project delays, cost overruns, and regulatory inefficiencies. This paper presents a system dynamics (SD) modeling framework for analyzing policy and resource dynamics within the construction sector in Sudan, with broader applicability to Least...

💬 0 commentsarXiv:2601.02405v1PDF
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Posted in astro-ph.GA · 2026-01-01 · Suyeon Son, Minjin Kim, Luis C. Ho

Asymmetric torus variability in active galactic nuclei driven by global brightening and dimming

Temporal asymmetry in the flux variability of active galactic nuclei (AGNs) offers key insights into the physical mechanisms driving AGN variability. In this study, we investigated the variability of the torus by analyzing temporal asymmetry in the mid-infrared (MIR) continuum. We compared ensemble structure functions between the...

💬 0 commentsarXiv:2601.00358v1PDF
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Posted in nlin.CD · 2026-01-01 · Ioannis Diamantis

A Topological Framework for Atmospheric River Interaction Using Framed Braids

Atmospheric Rivers (ARs) are filamentary moisture pathways responsible for a large fraction of extreme precipitation and often occur as interacting filament bundles within the same synoptic regime. Existing diagnostics typically analyze ARs in isolation, despite the frequent coexistence and interaction of multiple filaments. We...

💬 0 commentsarXiv:2601.00354v1PDF
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Posted in cond-mat.mes-hall · 2026-01-01 · Tianrui Liu

Evidence for the suppression of the hybrid skin-topological effect by fragile topology

Topological insulators are well-known for their topological edge states, which are protected by the non-trivial bulk topology and characterized by gapless Wannier bands, a phenomenon known as the bulk-boundary correspondence. However, fragile topology challenged this concept, the Wannier bands are gapped, but the edge states still...

💬 0 commentsarXiv:2601.00347v2PDF
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Posted in cond-mat.soft · 2026-01-01 · Sarah Jane Goodband, Ke Sun, Kislon Voïtchovsky, Halim Kusumaatmaja

Stretching and Compressing Capillary Bridges on Hydrophilic, Hydrophobic, and Liquid-infused Surfaces

Aqueous capillary liquid bridges are ubiquitous in nature and in technological processes. Here, we comparatively investigate capillary bridges formed between three distinct types of surfaces: (i) hydrophilic glass, (ii) hydrophobic dichlorodimethylsilane (DMS)-functionalized glass, and (iii) silicone-oil-infused LIS. We combine...

💬 0 commentsarXiv:2601.00345v1PDF
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Posted in physics.flu-dyn · 2026-01-01 · Xuehui Qian, Hongkai Tao, Yongji Wang

Solving nonlinear subsonic compressible flow in infinite domain via multi-stage neural networks

In aerodynamics, accurately modeling subsonic compressible flow over airfoils is critical for aircraft design. However, solving the governing nonlinear perturbation velocity potential equation presents computational challenges. Traditional approaches often rely on linearized equations or finite, truncated domains, which introduce...

💬 0 commentsarXiv:2601.00342v1PDF
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Posted in cond-mat.mtrl-sci · 2026-01-01 · Meshy Ochana, Ron Lifshitz

Tiling by Near Coincidence

Moiré patterns of twisted and scaled bilayers have recently emerged as a fertile source of quasiperiodic order in two-dimensional materials. Inspired by these systems, we introduce the \emph{near-coincidence method} for generating quasiperiodic tilings of the plane. The method is intuitive -- admitting pairs of nearly coincident...

💬 0 commentsarXiv:2601.00340v2PDF
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Posted in quant-ph · 2026-01-01 · Daniel Alabi, Theshani Nuradha

When Does Quantum Differential Privacy Compose?

Composition is a cornerstone of classical differential privacy, enabling strong end-to-end guarantees for complex algorithms through composition theorems (e.g., basic and advanced). In the quantum setting, however, privacy is defined operationally against arbitrary measurements, and classical composition arguments based on scalar...

💬 0 commentsarXiv:2601.00337v1PDF
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Posted in hep-th · 2026-01-01 · Siddhartha Paul, Adarsh Vishwakarma

Log Soft Constraints on KMOC Formalism

The KMOC formalism provides a systematic framework for extracting classical observables perturbatively from on-shell scattering amplitudes. In this work, we apply this formalism to compute electromagnetic observables in four dimensions, focusing in particular on the linear memory effect and its tail contributions. Using the leading...

💬 0 commentsarXiv:2601.00336v1PDF
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Posted in hep-ph · 2026-01-01 · Xinyi Yan, Honglei Li, Zhi-Long Han, Fei Huang, Ruiyu Xing

Study the property of $W^{\prime}$ at future $e^-p$ collider

As a strong candidate for new physics beyond the Standard Model, the exotic charged gauge boson $W^{\prime}$ has attracted extensive research interest. In this work we investigate the interactions of the $W^{\prime}$ boson at the electron-proton colliders. The process $e^- u \to ν_e d$ and $e^- u \to e^\pm jjj$ with $t$-channel...

💬 0 commentsarXiv:2601.00512v1PDF
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Posted in quant-ph · 2026-01-01 · Anton Kapustin, Daniil Radamovich

Chaos and thermalization in Clifford-Floquet dynamics

We study the ergodic properties of a unitary Floquet dynamics arising from the repeated application of a translationally-invariant Clifford Quantum Cellular Automata to an infinite system of qubits in d dimensions. One expects that if the QCA does not exhibit any periodicity, a generic initial state of qubits will thermalize, that is,...

💬 0 commentsarXiv:2601.00511v2PDF
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Posted in physics.chem-ph · 2026-01-01 · Li Chen, Leonardo Medrano Sandonas, Shirong Huang, Alexander Croy, Gianaurelio Cuniberti

Interpretable Machine Learning for Quantum-Informed Property Predictions in Artificial Sensing Materials

Digital sensing faces challenges in developing sustainable methods to extend the applicability of customized e-noses to complex body odor volatilome (BOV). To address this challenge, we developed MORE-ML, a computational framework that integrates quantum-mechanical (QM) property data of e-nose molecular building blocks with machine...

💬 0 commentsarXiv:2601.00503v1PDF
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Posted in astro-ph.HE · 2026-01-01 · Joseph O'Leary, Liam Dunn, Andrew Melatos

Discovering pulsars in compact binaries with a hidden Markov model

Discovering radio pulsars in compact binaries, whose orbital periods $P_{\rm b}$ satisfy $P_{\rm b} \lesssim 1 \, \rm{day}$, is computationally challenging, because the time-dependent pulse frequency $f_{\rm p}(t)$ is strongly Doppler modulated by the binary motion. Here we present a new, fast, semi-coherent detection scheme based on...

💬 0 commentsarXiv:2601.00500v1PDF
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Posted in astro-ph.CO · 2026-01-01 · Muhammad Yarahmadi, Amin Salehi

Late-Time Resolution of the Hubble Tension in CPL Cosmology with Massive Neutrinos via Bayesian Physics-Informed Neural Networks

We present a comprehensive Bayesian analysis of the Hubble constant within the framework of Physics-Informed Neural Networks (PINNs), focusing on the standard $Λ$CDM model and its dynamical dark energy extensions described by the Chevallier-Polarski-Linder (CPL) parametrization, both with and without massive neutrinos. By embedding...

💬 0 commentsarXiv:2601.00495v1PDF
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Posted in cond-mat.mtrl-sci · 2026-01-01 · Amirhossein Abedini, Behzad Mehrafrooz, Iyad Alabd Alhafez, Arash Kardani

Thermal History-Dependent Coalescence Mechanisms and Sintering Dynamics in Al-6.8%Cu Nanopowders

Aluminum-Copper (Al-Cu) alloys are essential materials for weight reduction critical structures in the aerospace and automotive industries, yet achieving their maximum ultrahigh-strength potential remains limited by nanoscale defect control during powder metallurgy processing. We employ large-scale molecular dynamics simulations on...

💬 0 commentsarXiv:2601.00492v1PDF
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Posted in physics.ins-det · 2026-01-01 · J. Sumaya-Martinez, E. Torres-Garcia

Fisher-Information-Driven Adaptive Acquisition for Photon-Efficient FLIM: A Dual-Implementation Framework for TCSPC and Programmable Time-Gating

We present a Fisher-information (FI) framework for photon-efficient fluorescence lifetime imaging microscopy (FLIM) that treats temporal sampling as a controllable design variable under a fixed photon (dose) budget. Starting from a Poisson photon-counting model for bi-exponential fluorescence decays convolved with a finite instrument...

💬 0 commentsarXiv:2601.00490v1PDF
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Posted in quant-ph · 2026-01-01 · Modi Ke, Dai-Nam Le, Lilia M. Woods

Casimir interactions between two parallel graphene sheets carrying steady-state drift currents

We investigate the fluctuation-induced Casimir interactions between two parallel graphene sheets carrying steady-state drift currents. The graphene properties are modeled based on the shifted Fermi disk model to capture the non-equilibrium optical response of the system. We find that the drift current introduces a repulsive correction...

💬 0 commentsarXiv:2601.00489v2PDF
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Posted in quant-ph · 2026-01-01 · Wenxuan Xie, John C Schotland

Non-Hermitian Band Topology and Edge States in Atomic Lattices

We investigate the band structure and topological phases of one- and two-dimensional bipartite atomic lattices mediated by long-range dissipative radiative coupling. By deriving an effective non-Hermitian Hamiltonian for the single-excitation sector, we demonstrate that the low-energy dynamics of the system are governed by a Dirac...

💬 0 commentsarXiv:2601.00487v1PDF