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Physics

arXiv preprints from January 1, 2026 through September 22, 2026 — 22:18:48 EST

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Posted in gr-qc · 2026-01-20 · Rohit Das, Parthasarathi Majumdar, Debadrita Mukherjee

Inverse Area Corrections to Black Hole Entropy Area Formula in F(R) Gravity and Gravitational Wave Observations

We consider corrections to the Bekenstein Hawking Area Formula for black hole entropy, which have inverse powers of the horizon area for very large horizon areas, for classical spherically symmetric black hole solutions of F(R) modified gravity theory, using the Wald formula for the entropy function with modifications suggested by...

💬 0 commentsarXiv:2601.13863v2PDF
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Posted in cond-mat.soft · 2026-01-20 · Alexander V. Petrunin, Susanne Braun, Felix J. Byn, Indré Milvydaité, Timon Kratzenberg, Pablo Mota-Santiago, Andrea Scotti, Andrij Pich, Walter Richtering

Unraveling the Mechanisms of Ultrasound-Induced Mechanical Degradation of Microgels: Effects of Mechanoresponsive Crosslinks, Softness, and Core-Shell Architecture

Ultrasound-induced degradation of soft polymeric colloids, like microgels, as well as a controlled drug release enabled by mechanoresponsive bonds, has recently attracted considerable attention. However, most examples in the literature focus primarily on the applications rather than examining the underlying mechanisms of the...

💬 0 commentsarXiv:2601.13862v1PDF
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Posted in cond-mat.str-el · 2026-01-20 · Andreas Schellenberger, Kai P. Schmidt

To infinity and back -- $1/N$ graph expansions of light-matter systems

We present a method for performing a full graph expansion for light-matter systems, utilizing the linked-cluster theorem. This method enables us to explore $1/N$ corrections to the thermodynamic limit $N\to \infty$ in the number of particles, giving us access to the mesoscopic regime. While this regime is yet largely unexplored due to...

💬 0 commentsarXiv:2601.13860v2PDF
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Posted in cond-mat.mes-hall · 2026-01-20 · Feulefack Ornela Claire, Dongmo Tedo Lynsia Saychele, Danga Jeremie Edmond, Keumo Tsiaze Roger Magloire, Fridolin Melong, Kenfack-Sadem Christian, Fotue Alain Jerve, Mahouton Norbert Hounkonnou, Lukong Cornelius Fai

Confinement-Tunable Synthetic Gauge Fields and Floquet Topological Phenomena in a Driven Quantum Wire Qubit

Theoretical analysis demonstrates that a spin qubit in a parabolic quantum wire, when driven by a bichromatic field, exhibits a confinement-tunable synthetic gauge field leading to novel Floquet topological phenomena. The underlying mechanism for topological protection of qubit states against time-periodic perturbations is presented....

💬 0 commentsarXiv:2601.13859v2PDF
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Posted in gr-qc · 2026-01-20 · Mattia Emma, Gregory Ashton

RNLE: Residual neural likelihood estimation and its application to gravitational-wave astronomy

Simulation-based inference provides a powerful framework for Bayesian inference when the likelihood is analytically intractable or computationally prohibitive. By leveraging machine-learning techniques and neural density estimators, it enables flexible likelihood or posterior modeling directly from simulations. We introduce Residual...

💬 0 commentsarXiv:2601.13857v1PDF
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Posted in physics.soc-ph · 2026-01-20 · Leyang Xue, Shengling Gao, Bnaya Gross, Orr Levy, Daqing Li, Zengru Di, Lazaros K. Gallos, Shlomo Havlin

The mechanistic origin of branching-driven nucleation in abrupt phase transitions

Phase transitions are the macroscopic manifestation of microscopic processes that drive a system towards a new state. The detailed evolution of these processes, particularly in abrupt phase transitions, are currently not fully understood. Here, we introduce a theoretical framework based on internal node dependencies within a...

💬 0 commentsarXiv:2601.13854v1PDF
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Posted in astro-ph.SR · 2026-01-20 · P. Muñoz-Cutanda, I. Rebollido, B. Montesinos, P. Cruz, O. Absil, S. Ertel

Follow-up of three exocomet-host candidates

Exocomets are small bodies that evaporate when they approach their host star. They are detected through variability of non-photospheric features with spectroscopy and/or asymmetric transits in time-series photometry. In the past four decades ~30 systems have shown such variations, and were therefore classified as exocomet host stars....

💬 0 commentsarXiv:2601.13850v1PDF
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Posted in physics.atm-clus · 2026-01-20 · Raiane Ferreira Monteiro, João Marcos T. Palheta, Tulio Gnoatto Grison, Octávio Rodrigues Filho, Renato Luis Tame Parreira, Diego Guedes-Sobrinho, Celso R. C. Rêgo, Alexandre C. Dias, Krys Elly de Araújo Batista, Maurício J. Piotrowski

Interpretable, Physics-Informed Learning Reveals Sulfur Adsorption and Poisoning Mechanisms in 13-Atom Icosahedra Nanoclusters

Transition-metal nanoclusters exhibit structural and electronic properties that depend on their size, often making them superior to bulk materials for heterogeneous catalysis. However, their performance can be limited by sulfur poisoning. Here, we use dispersion-corrected density functional theory (DFT) and physics-informed machine...

💬 0 commentsarXiv:2601.13845v1PDF
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Posted in cond-mat.mtrl-sci · 2026-01-20 · Beatriz Martín-García, M. Mercedes Velázquez

Nanoparticle Self-assembly Assisted by Polymers: The Role of Shear Stress in the Nanoparticle Arrangement of Langmuir and Langmuir-Blodgett Films

We propose to use the self-assembly ability of a block copolymer combined with compression-expansion cycles to obtain CdSe quantum dots (QDs) structures of different morphology. The methodology proposed consists in transferring onto mica mixed Langmuir monolayers of QDs and the polymer poly (styrene-co-maleic anhydride) partial 2...

💬 0 commentsarXiv:2601.13842v1PDF
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Posted in physics.flu-dyn · 2026-01-20 · Yingfan Geng, Jinhong Wang, Teng Cao

Diffusion Model Driven Airfoil Design: From Geometry Encoding to Practical Applications

Diffusion model, the state-of-the-art generative machine learning architecture, has shown promising results airfoil inverse designs. In this study, we implemented and trained a series of diffusion models on three different airfoil geometry data encoding formats -- principal component weights, ordered $x$-$y$ coordinates, and 2D signed...

💬 0 commentsarXiv:2601.16228v1PDF
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Posted in astro-ph.CO · 2026-01-20 · Sanjeev Sanyal, Pavan Kumar Aluri, Arman Shafieloo

Examination of frequency and scale dependence of CMB hemispherical power asymmetry

In this study, we revisit the well-known cosmic microwave background (CMB) anomaly referred to as Hemispherical Power Asymmetry (HPA), using CMB temperature maps from the Planck mission public release 4 (PR4) and the WMAP nine-year data release. Employing the Local Variance Estimator (LVE) method, we systematically reexamine the...

💬 0 commentsarXiv:2601.13830v1PDF
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Posted in hep-ph · 2026-01-20 · Redamy Perez-Ramos, Stefan Kluth, Wolfgang Ochs

The Dead Cone Effect in Heavy-Quark Jets: A Unified Study from Charm and Bottom to Top

We present a unified overview of recent progress in the study of QCD radiation in heavy-quark jets, focusing on the dead-cone effect. Using precision data from LEP at $\sqrt{s}=91.2$~GeV, we demonstrate strong momentum-space suppression in charm and bottom quark jets, supported by Monte Carlo simulations with \textsc{Pythia}8, and...

💬 0 commentsarXiv:2601.13831v2PDF
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Posted in physics.optics · 2026-01-20 · Makafui Avevor, Hossein Safi, Harald Haas, Iman Tavakkolnia

Modulating Retroreflectors for CubeSat Optical Inter Satellite Links: Modeling, Optimization, and Benchmarking

Modulating retroreflectors (MRRs) offer a promising pathway to low-complexity and energy efficient asymmetric optical inter-satellite link (OISL) for small spacecrafts, such as CubeSats. In this paper, we develop a unified statistical channel model for an on off keying modulated, retroreflector-enabled OISL. The model captures both...

💬 0 commentsarXiv:2601.13829v1PDF
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Posted in cond-mat.mtrl-sci · 2026-01-20 · Beatriz Martín-García, Pedro M. R. Paulo, Sílvia M. B. Costa, M. Mercedes Velázquez

Photoluminescence Dynamics of CdSe QD/polymer Langmuir-Blodgett Thin Films: Morphology Effects

Thin films of colloidal semiconductor CdSe quantum-dots (QDs) and a styrene/maleic anhydride copolymer were prepared by the Langmuir-Blodgett technique and their photoluminescence was characterized by confocal fluorescence lifetime microscopy. In the films, the photoluminescence dynamics are strongly affected by excitation energy...

💬 0 commentsarXiv:2601.14331v1PDF
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Posted in math-ph · 2026-01-20 · João P. da Cruz

Dimensional Constraints from SU(2) Representation Theory in Graph-Based Quantum Systems

We investigate dimensional constraints arising from representation theory when abstract graph edges possess internal degrees of freedom but lack geometric properties. We prove that such internal degrees of freedom can only encode directional information, necessitating quantum states in $\mathbb{C}^2$ (qubits) as the minimal...

💬 0 commentsarXiv:2601.13828v1PDF
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Posted in nucl-th · 2026-01-20 · Yixin Guo, Hiroyuki Tajima, Haozhao Liang

Comparative study of quartet superfluid state: Quartet Bardeen-Cooper-Schrieffer theory and generalized Nambu-Gor'kov formalism

We theoretically investigate a quartet superfluid state in fermionic matter by using the quartet Bardeen-Cooper-Schrieffer (BCS) variational theory and the Green's function method. We demonstrate that the quartet BCS theory with the multiple-infinite-product ansatz successfully reproduces an exact four-body result in a one-dimensional...

💬 0 commentsarXiv:2601.13825v1PDF
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Posted in physics.optics · 2026-01-20 · Yasmin Kopp, Gregor Hehl, Johann Gabriel Meyer, Simon Goncharov, Oleg Pronin

Carrier-Envelope-Offset Frequency Stabilization of a High Peak and Average Power Thin-Disk Oscillator

In this work, we demonstrate carrier-envelope-offset (CEO) frequency stabilization of a Kerr-lens mode-locked thin-disk oscillator delivering 180 W average power, 80 MW output peak power, and >500 MW intra-cavity peak power, the highest peak power achieved in any stabilized thin-disk oscillator system. The CEO frequency detection is...

💬 0 commentsarXiv:2601.13821v1PDF
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Posted in astro-ph.CO · 2026-01-20 · Mubtasim Fuad, Sonia Akter Ema, Md Rasel Hossen

Tracing Cosmological Signature with Doppler Lensing: Insights from Cosmological Simulations

Doppler lensing, a relativistic effect resulting from the peculiar velocities of galaxies along the line of sight, provides insight into the large-scale structure of the Universe. Relativistic simulations are essential for modeling Doppler lensing because they incorporate gravity and motion in spacetime. We compare two relativistic...

💬 0 commentsarXiv:2601.13820v1PDF
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Posted in hep-ph · 2026-01-20 · Balma Duch, Pere Masjuan, Hubert Spiesberger

$\mathbf{γZ}$ Box at Low Energy

We calculate the 1-loop $γZ$ box-graph correction to electron-quark scattering at low energy and low momentum transfer. Both electron and quark masses are kept non-zero. From our result, we extract coupling constants for the low-energy effective Lagrangian with parity-violating 4-fermion interaction terms. We study the zero-mass...

💬 0 commentsarXiv:2601.13819v1PDF
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Posted in physics.app-ph · 2026-01-20 · Luigi Romano

Two-dimensional FrBD friction models for rolling contact: extension to linear viscoelasticity

This paper extends the distributed rolling contact FrBD framework to linear viscoelasticity by considering classic derivative Generalised Maxwell and Kelvin-Voigt rheological representations of the bristle element. With this modelling approach, the dynamics of the bristle, generated friction forces, and internal deformation states are...

💬 0 commentsarXiv:2601.13818v12PDF
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Posted in cond-mat.stat-mech · 2026-01-20 · Andrea Mazzolini, Mattia Corigliano, Rossana Droghetti, Matteo Osella, Marco Cosentino-Lagomarsino

Component systems: do null models explain everything?

Component systems - ensembles of realizations built from a shared repertoire of modular parts - are ubiquitous in biological, ecological, technological, and socio-cultural domains. From genomes to texts, cities, and software, these systems exhibit statistical regularities that often meet the "bona fide" requirements of laws in the...

💬 0 commentsarXiv:2601.13985v1PDF
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Posted in physics.flu-dyn · 2026-01-20 · Stefano Lanzini, Massimo Marro, Mathieu Creyssels, Alexandre Azouzi, Pietro Salizzoni

Experimental study on gravity currents flowing on heated walls

We present an experimental study on steady gravity currents advancing along a heated wall. The current is generated by a mixture of air and carbon dioxide continuously supplied at the channel inlet. To have a complete point-wise characterization of the flow, simultaneous high-frequency measurements of two velocity components, CO_2...

💬 0 commentsarXiv:2601.13984v1PDF
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Posted in quant-ph · 2026-01-20 · M. Karthick Selvan, S. Balakrishnan

Optimal Construction of Two-Qubit Gates using the Symmetries of B Gate Equivalence Class

Two applications of gates from the B gate equivalence class can generate all two-qubit gates. This local equivalence class is invariant under the mirror (multiplication with the SWAP gate) operation, inverse (Hermitian conjugate) operation, and the combined inverse and mirror operations. The last two symmetries are associated with the...

💬 0 commentsarXiv:2601.13983v3PDF
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Posted in cond-mat.mtrl-sci · 2026-01-20 · Ruben Dragland, Jan Schultheiß, Ivan N. Ushakov, Roger Proksch, Dennis Meier

Correlated domain and crystallographic orientation mapping in uniaxial ferroelectric polycrystals by interferometric vector piezoresponse force microscopy

Ongoing advances in scanning probe microscopy techniques are continually expanding the possibilities for nanoscale characterization and correlated studies of functional materials. Here, we demonstrate how a recent extension of piezoresponse force microscopy (PFM), known as interferometric vector PFM, can be utilized for simultaneously...

💬 0 commentsarXiv:2601.13982v1PDF
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Posted in physics.plasm-ph · 2026-01-20 · Rishin Madan, Wrick Sengupta, Elizabeth J. Paul, Mohammed Haque, Richard Nies, José Luis Velasco, Amitava Bhattacharjee

The Geometry of Flux Surfaces with Quasi-Poloidal Symmetry

Quasi-poloidal (QP) magnetic fields have desirable properties for confining plasma: no radial drift of guiding centres (with positive implications for neoclassical transport), zero Pfirsch-Schlüter current, and a lower level of damping for poloidal flows. Despite their attractive properties, QP fields are not amenable to the near-axis...

💬 0 commentsarXiv:2601.13980v2PDF