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Physics

arXiv preprints from January 1, 2026 through September 24, 2026 — 21:02:38 EST

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Posted in astro-ph.GA · 2026-01-08 · Philipp Denzel, Manuel Weiss, Elena Gavagnin, Frank-Peter Schilling

Optimization of Deep Learning Models for Radio Galaxy Classification

Modern radio telescope surveys, capable of detecting billions of galaxies in wide-field surveys, have made manual morphological classification impracticable. This applies in particular when the Square Kilometre Array Observatory (SKAO) becomes operable in 2027, which is expected to close an important gap in our understanding of the...

💬 0 commentsarXiv:2601.04773v1PDF
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Posted in cond-mat.mes-hall · 2026-01-08 · Lorenz Meyer, Nicolas Néel, Jörg Kröger

Single-enantiomer spin polarisers in superconducting junctions

Chiral matter acting as a spin-selective device in biased electron transport is attracting attention for the quantum-technological design of miniaturized electronics. To date, however, experimental reports on spin selectivity are not conclusive. The magnetoresistance in electron transport measurements observed for chiral materials on...

💬 0 commentsarXiv:2601.04772v1PDF
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Posted in cond-mat.mtrl-sci · 2026-01-08 · He Zhao, Eline M. Hutter

Tuning Excitonic Properties and Charge Carrier Dynamics by Halide Alloying in Cs3Bi2(Br1-xIx)9 semiconductors

The perovskite-inspired bismuth halide semiconductor Cs3Bi2Br9 is widely investigated as photoactive material for light-conversion applications. However, charge generation and separation are inherently limited by its modest sunlight absorption and strong exciton binding energy, respectively. Here, we demonstrate that both the light...

💬 0 commentsarXiv:2601.04771v1PDF
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Posted in astro-ph.SR · 2026-01-08 · Gautam Bhuyan, Shashi Kanbur, Sukanta Deb, Louise Breuval, Anupam Bhardwaj, Mami Deka, Earl P. Bellinger, Kerdaris Kurbah

The effect of metallicity on the Leavitt Law using phase-dependent properties of classical Cepheids

The absolute calibration of period-luminosity (PL) relations of Cepheids in the Milky Way (MW) and its nearby galaxies has been a cornerstone in determining extragalactic distances and the current local expansion rate of the Universe. However, the universality of PL relations is still debated; particularly, the metallicity effect on...

💬 0 commentsarXiv:2601.04769v1PDF
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Posted in hep-ex · 2026-01-08 · Louise Beriet, Matteo Defranchis, Birgit Stapf, Michele Selvaggi

Differential measurements of $\bar{t}tZ$ and $\bar{t}t\bar{t}t$ at large $Q^2$ at FCC-hh

This contribution presents studies of differential top-quark measurements at the Future Circular Collider in its proton-proton stage (FCC-hh). The analyses target the leptonic final states of the $\bar{t}tZ$ and $\bar{t}t\bar{t}t$ production processes. Particular focus is given to the high-$Q^2$ regime, where sensitivity to new...

💬 0 commentsarXiv:2601.04763v2PDF
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Posted in cond-mat.mtrl-sci · 2026-01-08 · Emanuele Maggio

Berry Phase of Bloch States through Modular Symmetries

The theoretical identification of crystalline topological materials has enjoyed sustained success in simplified materials models, often by singling out discrete symmetry operations protecting the topological phase. When band structure calculations of realistic materials are considered, complications often arise owing to the...

💬 0 commentsarXiv:2601.04762v2PDF
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Posted in astro-ph.CO · 2026-01-08 · Mahdieh Eskandari Merajin

Probing Trans-Planckian Signatures in the Early Universe: A Bayesian Analysis of the Generalized Sasaki-Mukhanov Equation

We present a rigorous and comprehensive investigation of a generalized inflationary perturbation theory designed to address persistent large-scale anomalies in the Cosmic Microwave Background (CMB). Motivated by the Trans-Planckian problem and potential non-canonical dynamics in the early Universe, we introduce a generalized...

💬 0 commentsarXiv:2601.04760v1PDF
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Posted in cond-mat.soft · 2026-01-08 · Magali Le Goff, Laureano Ortellado, Jiting Tian, Mehdi Bouzid, Jean-Louis Barrat, Kirsten Martens

Mechanisms of Spatiotemporal Damage Evolution in Double Polymer Networks

Double polymer networks exhibit a striking enhancement of toughness compared to single networks, yet the microscopic mechanisms governing stress redistribution, damage evolution, and fracture remain incompletely understood. Using large-scale coarse-grained molecular dynamics simulations under uniaxial deformation, we resolve bond...

💬 0 commentsarXiv:2601.04759v1PDF
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Posted in cond-mat.mtrl-sci · 2026-01-08 · Haowei Hua, Chen Liang, Ding Pan, Irwin King, Shengchao Liu, Koji Tsuda, Wanyu Lin

Scalable Dielectric Tensor Predictions for Inorganic Materials using Equivariant Graph Neural Networks

Accurate prediction of dielectric tensors is essential for accelerating the discovery of next-generation inorganic dielectric materials. Existing machine learning approaches, such as equivariant graph neural networks, typically rely on specially-designed network architectures to enforce O(3) equivariance. However, to preserve...

💬 0 commentsarXiv:2601.04755v2PDF
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Posted in cond-mat.quant-gas · 2026-01-08 · Aritra Ghosh, Nilamoni Daloi, M. Bhattacharya

Topological sensing of superfluid rotation using non-Hermitian optical dimers

We theoretically investigate a non-Hermitian optical dimer whose parameters are renormalized by dispersive and dissipative backaction from the coupling of the passive cavity with a ring-trapped Bose-Einstein condensate. The passive cavity is driven by a two-tone control laser, where each tone is in a coherent superposition of...

💬 0 commentsarXiv:2601.04749v2PDF
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Posted in cond-mat.soft · 2026-01-08 · M. Milani, E. Cavalletti, V. Ruzzi, A. Martinelli, P. Dieudonne-George, C. Ligoure, T. Phou, L. Cipelletti, L. Ramos

Decoupling Structure and Elasticity in Colloidal Gels Under Isotropic Compression

We exploit the controlled drying of millimeter-sized gel beads to investigate isotropic compression of colloidal fractal gels. Using a custom dynamic light scattering setup, we demonstrate that stresses imposed by drying on the bead surface propagate homogeneously throughout the gel volume, inducing plastic rearrangements. We find...

💬 0 commentsarXiv:2601.04737v1PDF
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Posted in astro-ph.IM · 2026-01-08 · Nalin Dhiman

sidmkit: A Reproducible Toolkit for SIDM Phenomenology and Galaxy Rotation-Curve Modeling

Self-interacting dark matter (SIDM) is a well-motivated extension of cold dark matter that can modify halo structure on galactic and group scales while remaining consistent with large-scale structure. However, practical SIDM work often requires bridging several layers, including microphysical scattering models, velocity-dependent...

💬 0 commentsarXiv:2601.04735v1PDF
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Posted in quant-ph · 2026-01-08 · Nicholas S. Yama, Chun-Chi Wu, Fariba Hatami, Kai-Mei C. Fu

A scalable gallium-phosphide-on-diamond spin-photon interface

The efficient interfacing of quantum emitters and photons is fundamental to quantum networking. Quantum defects embedded in integrated nanophotonic circuits are promising for such applications due to the deterministic light-matter interactions of high-cooperativity ($C>1$) cavity quantum electrodynamics and potential for scalable...

💬 0 commentsarXiv:2601.04733v1PDF
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Posted in quant-ph · 2026-01-08 · Dominik Freinberger, Philipp Moser

The Role of Quantum in Hybrid Quantum-Classical Neural Networks: A Realistic Assessment

Quantum machine learning has emerged as a promising application domain for near-term quantum hardware, particularly through hybrid quantum-classical models that leverage both classical and quantum processing. Although numerous hybrid architectures have been proposed and demonstrated successfully on benchmark tasks, a significant open...

💬 0 commentsarXiv:2601.04732v1PDF
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Posted in hep-th · 2026-01-08 · Eric A. Bergshoeff, Patrick Concha, Octavio Fierro, Evelyn Rodríguez, Jan Rosseel

Applied foliated conformal Carroll symmetries

We apply the conformal compensating technique for constructing matter couplings to conformal scalars on a $D$-dimensional foliated conformal Carroll manifold dividing the tangent space into $(p+1)$-dimensional longitudinal and $(D-p-1)$-dimensional transversal directions corresponding to $p$-branes. We show that the conformal Carroll...

💬 0 commentsarXiv:2601.04910v1PDF
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Posted in cond-mat.str-el · 2026-01-08 · Vincent C. Morano, Zeno Maesen, Stanislav Nikitin, Jonathan S. White, Takashi Honda, Tsuyoshi Kimura, Michel Kenzelmann, Daniel Pajerowski, Oksana Zaharko

Coupled sawtooth chain exchange network in olivine Mn$_2$GeO$_4$

Sawtooth chain magnets have been a subject of historical interest in the field of frustrated magnetism, with classical olivine family $M_2TX_4$, ($M$ - 3d, $T$ - 4p, $X$ - chalcogen elements) typically realizing simple $\mathbf{k} = (000)$ states. The magnetism of the Mn$_2$GeO$_4$ olivine is surprisingly complex, proceeding from...

💬 0 commentsarXiv:2601.04908v1PDF
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Posted in quant-ph · 2026-01-08 · Sachin Sonkar, Ramandeep S. Johal

Virtual temperatures as a key quantifier for passive states in quantum thermodynamic processes

We analyze the role of virtual temperatures for passive quantum states through the lens of majorization theory. A mean temperature over the virtual temperatures of adjacent energy levels is defined to compare the passive states of the system resulting from isoenergetic and isoentropic transformations. The role of the minimum and the...

💬 0 commentsarXiv:2601.04905v1PDF
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Posted in physics.acc-ph · 2026-01-08 · G. V. Sotnikov, K. V. Galaydych, P. I. Markov

Wakefield Acceleration in a Layered Plasma Waveguide

Plasma wakefield accelerators (PWFA) represent one of the promising new accelerator concepts that are now being developed intensively for future applications in high-energy physics and industry. Among the unresolved problems of practical implementation of PWFA there are maintaining the required quality (emittance, size, energy spread...

💬 0 commentsarXiv:2601.04903v2PDF
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Posted in physics.comp-ph · 2026-01-08 · Ao Zhou, Salma Zahran, Chi Chen, Zhengyang Zhang, Yanming Wang

A joint voxel flow-phase field framework for ultra-long microstructure evolution prediction with physical regularization

Phase-field (PF) modeling is a powerful tool for simulating microstructure evolution. To accelerate the simulation of PF models governed by complex PDEs, machine learning methods such as PINNs and ConvLSTM have been introduced. However, current machine-learning-based approaches still suffer from limited flexibility, poor...

💬 0 commentsarXiv:2601.04898v2PDF
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Posted in gr-qc · 2026-01-08 · T. Torres, S. R. Dolan

Dynamical system approach to the spectral (in)stability of black holes under localised potential perturbations

The aim of this work is to improve understanding of the resonant spectra of black holes under perturbations arising from e.g. compact objects or accretion disks in their vicinity. It is known that adding a weak perturbation to the radial potential can strongly disrupt the spectrum of quasinormal modes and Regge poles of a black hole...

💬 0 commentsarXiv:2601.04892v2PDF
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Posted in physics.atom-ph · 2026-01-08 · Akhil Ayyadevara, Anand Prakash, Shovan Dutta, Arun Paramekanti, S. A. Rangwala

Symmetry-controlled thermal activation in pyramidal Coulomb clusters: Testing Kramers-Langer theory

Laser-cooled ions confined in electromagnetic traps provide a unique, tunable mesoscopic system where the interplay of the trapping potential, nonlinear Coulomb interactions, and laser-ion scattering generates rich, collective dynamics. In this work, we engineer thermally activated switching between two oppositely oriented,...

💬 0 commentsarXiv:2601.04883v1PDF
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Posted in quant-ph · 2026-01-08 · Tobias Starke

Quantenlogische Systeme und Tensorproduktraeume

In this work we present an intuitive construction of the quantum logical axiomatic system provided by George Mackey. The goal of this work is a detailed discussion of the results from the paper 'Physical justification for using the tensor product to describe two quantum systems as one joint system' [1] published by Diederik Aerts and...

💬 0 commentsarXiv:2601.04880v2PDF
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Posted in astro-ph.HE · 2026-01-08 · Rahul Sharan, Bhaswati Bhattacharyya, Simon Johnston, Patrick Weltevrede, Jayanta Roy

Temporal Variations in Pulsar Spectro-Polarimetry: Findings from millisecond pulsar J2144-5237 using Parkes UWL receiver

While the temporal variations of the spectro-polarimetric nature of pulsars remains unexplored, this investigation offers significant potential for uncovering key insights into pulsar emission mechanisms, magnetic field geometry, and propagation effects within the magnetosphere. We developed a package for investigating time-varying...

💬 0 commentsarXiv:2601.04877v1PDF
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Posted in physics.soc-ph · 2026-01-08 · Xiao-Yang Li, Shi-Shun Chen, Waichon Lio, Rui Kang

Reliability is a new science: we are on the right way

Reliability has long been treated as an engineering practice supported by testing, statistics and standards, yet its status as a scientific discipline remains unsettled. From a philosophical perspective, scientific truth is characterized by a dual-structure that links empirical truth and mathematical truth, which requires an axiomatic...

💬 0 commentsarXiv:2601.06206v1PDF