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arXiv preprints from January 1, 2026 through September 27, 2026 — 00:32:40 EST

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Posted in cond-mat.mtrl-sci · 2026-01-17 · Klaudija Paliušytė, Laura Fuchs, Zehua Xu, Kuangjie Liu, Kornel Roztocki, Shuo Sun, Hendrik Zipse, Achim Hartschuh, Frank Ortmann, Jenny Schneider

Single-Atom Tuning of Structural and Optoelectronic Properties in Halogenated Anthracene-Based Covalent Organic Frameworks

Strategies for tuning structural and (opto-)electronic properties are fundamental to the rational design of functional materials. Here, we present a molecular design approach for precisely modulating the optoelectronic properties of covalent organic frameworks (COFs) through single-atom halogen substitution on $π$-extended anthracene...

💬 0 commentsarXiv:2601.12103v1PDF
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Posted in cond-mat.stat-mech · 2026-01-17 · Giovanni Di Fresco, Aldo Coraggio, Alessandro Silva, Andrea Gambassi

Measurement-induced crossover in quantum first-detection times

The quantum first-detection problem concerns the statistics of the time at which a system, subject to repeated measurements, is observed in a prescribed target state for the first time. Unlike its classical counterpart, the measurement back action intrinsic to quantum mechanics may profoundly alter the system dynamics. Here we show...

💬 0 commentsarXiv:2601.12102v1PDF
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Posted in math.AP · 2026-01-17 · Stefan Schiffer

Higher integrability of solutions to elliptic equations under additional sign constraints

Solutions to elliptic equations often exhibit higher regularity properties such as \emph{higher integrability}. That is, for instance, a solution $u$ to a system that a priori only satisfies $ u \in W^{1,r}$ is more regular and even in the Sobolev space $W^{1,s}$ for some $s>r$. Under additional constraints of the sign of specific...

💬 0 commentsarXiv:2601.12100v1PDF
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Posted in cs.CL · 2026-01-17 · Leonardo S. Goodall, Dor Shilton, Daniel A. Mullins, Harvey Whitehouse

Large language models struggle with ethnographic text annotation

Large language models (LLMs) have shown promise for automated text annotation, raising hopes that they might accelerate cross-cultural research by extracting structured data from ethnographic texts. We evaluated 7 state-of-the-art LLMs on their ability to annotate 121 ritual features across 567 ethnographic excerpts. Performance was...

💬 0 commentsarXiv:2601.12099v1PDF
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Posted in physics.comp-ph · 2026-01-17 · Zichong Zhang, Shuze Zhu

Real-Symmetric Hamiltonian Enables Near-Linear Scaling for Fast Million-Atom Electronic Structure Computations

The exploration of quantum phenomena in mesoscale materials, such as moire superlattices, is limited by the cubic scaling cost of conventional electronic structure methods. Here, we introduce a scalable tight binding framework that achieves near linear scaling, enabling mesoscopic quantum simulations. By transforming the complex...

💬 0 commentsarXiv:2601.12098v3PDF
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Posted in quant-ph · 2026-01-17 · Elhabib Jaloum, Mohamed Amazioug

Probing multiparameter quantum estimation in the process $e^+e^-\to J/ψ\to \text{B}\bar{\text{B}}$ at BESIII

The quantum Fisher information matrix (QFIM) is the cornerstone of multiparameter quantum metrology. In this work, we investigate multiparameter quantum estimation in baryon-antibaryon (B bar-B) pairs produced via the e+ e- -> J/psi -> B bar-B process at the BESIII experiment, utilizing the symmetric logarithmic derivative (SLD)...

💬 0 commentsarXiv:2601.12097v1PDF
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Posted in math.AP · 2026-01-17 · Roberto Colombo, Anuj Kumar

Sharpness of the Osgood Criterion for the Continuity Equation with Divergence-free Vector Fields

For any modulus of continuity $ω$ that fails the Osgood condition, we construct a divergence-free velocity field $v \in C_t C^ω_x$ for which the associated ODE admits at least two distinct flow maps. In other words, non-uniqueness does not occur merely for a single or even finitely many trajectories, but instead on a set of initial...

💬 0 commentsarXiv:2601.12096v1PDF
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Posted in cs.LG · 2026-01-17 · Hamidreza Sadeghi, Saeedeh Momtazi, Reza Safabakhsh

Neural Isomorphic Fields: A Transformer-based Algebraic Numerical Embedding

Neural network models often face challenges when processing very small or very large numbers due to issues such as overflow, underflow, and unstable output variations. To mitigate these problems, we propose using embedding vectors for numbers instead of directly using their raw values. These embeddings aim to retain essential...

💬 0 commentsarXiv:2601.12095v1PDF
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Posted in astro-ph.IM · 2026-01-17 · John Banovetz, Claire-Alice Hebert, Peter B. Denton, Dan Scolnic, Anze Slosar, Chris Walter

Uncovering the Next Galactic Supernova with the Vera C. Rubin Observatory

Supernovae are observed to occur approximately 1-2 times per century in a galaxy like the Milky Way. Based on historical records, however, the last core-collapse galactic supernova observed by humans occurred almost 1,000 years ago. Luckily, we are well positioned to catch the next one with the advent of new neutrino detectors and...

💬 0 commentsarXiv:2601.12094v2PDF
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Posted in cs.LG · 2026-01-17 · Duarte Alexandrino, Ben Moseley, Pavlos Protopapas

PTL-PINNs: Perturbation-Guided Transfer Learning with Physics- Informed Neural Networks for Nonlinear Systems

Accurately and efficiently solving nonlinear differential equations is crucial for modeling dynamic behavior across science and engineering. Physics-Informed Neural Networks (PINNs) have emerged as a powerful solution that embeds physical laws in training by enforcing equation residuals. However, these struggle to model nonlinear...

💬 0 commentsarXiv:2601.12093v1PDF
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Posted in quant-ph · 2026-01-17 · Léon Brenig, Marc Vincke

An unexpected theoretical structure that could explain quantum-mechanics postulates like the Born rule and the wave-function reduction

A unique postulate is shown to underly the whole quantum mechanics theory: the invariance of the Heisenberg uncertainty inequality under a group of special nonlinear gauge transformations (NLGT). With this postulate, the quantum mechanics of a free particle is derived from classical mechanics, including the statements of the...

💬 0 commentsarXiv:2601.12092v1PDF
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Posted in cs.LG · 2026-01-17 · Qian Tan, Lei Jiang, Yuting Zeng, Shuoyang Ding, Xiaohua Xu

Mitigating Cultural Bias in LLMs via Multi-Agent Cultural Debate

Large language models (LLMs) exhibit systematic Western-centric bias, yet whether prompting in non-Western languages (e.g., Chinese) can mitigate this remains understudied. Answering this question requires rigorous evaluation and effective mitigation, but existing approaches fall short on both fronts: evaluation methods force outputs...

💬 0 commentsarXiv:2601.12091v1PDF
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Posted in cs.CV · 2026-01-17 · Matej Mok, Lukáš Gajdošech, Michal Mesároš, Martin Madaras, Viktor Kocur

Detecting 3D Line Segments for 6DoF Pose Estimation with Limited Data

The task of 6DoF object pose estimation is one of the fundamental problems of 3D vision with many practical applications such as industrial automation. Traditional deep learning approaches for this task often require extensive training data or CAD models, limiting their application in real-world industrial settings where data is...

💬 0 commentsarXiv:2601.12090v2PDF
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Posted in cs.AR · 2026-01-17 · Erwan Tanguy-Legac, Tommaso Belvedere, Gianluca Corsini, Marco Tognon, Marcello Traiola

Domain-specific Hardware Acceleration for Model Predictive Path Integral Control

Accurately controlling a robotic system in real time is a challenging problem. To address this, the robotics community has adopted various algorithms, such as Model Predictive Control (MPC) and Model Predictive Path Integral (MPPI) control. The first is difficult to implement on non-linear systems such as unmanned aerial vehicles,...

💬 0 commentsarXiv:2601.12089v1PDF
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Posted in gr-qc · 2026-01-17 · Salvatore Capozziello, Maurizio Capriolo, Gaetano Lambiase

The gravitational energy-momentum pseudo-tensor in $f(Q)$ non-metric gravity

We derive the affine tensor associated with the energy and momentum densities of both gravitational and matter fields, the complex pseudo-tensor, for $f(Q)$ non-metric gravity, the straightforward extension of Symmetric Teleparallel Equivalent of General Relativity (STEGR), characterized by a flat, torsion-free, non-metric connection....

💬 0 commentsarXiv:2601.12088v1PDF
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Posted in physics.app-ph · 2026-01-17 · Dan Che, Changjun Liu, Haoming He, Zhi Hua Ren, Pengde Wu

Second- and Third-Harmonic Backscatter Through a Bandstop Filter Using Defected Ground Structure

In this brief, a novel harmonic-backscatter-rectifier (HBR) is introduced for simultaneous rectification and harmonic-based uplink. The proposed (HBR) employs a rectifier to generate both DC power and the harmonic carriers for backscattering communication, and a dual-band reconfigurable band-stop filter using defected ground...

💬 0 commentsarXiv:2601.12087v1PDF
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Posted in hep-th · 2026-01-17 · A. A/ Zheltukhin

Tensionless spinning string: emergence of world-sheet torsion and covariant density of energy-momentum tensor

The action of tensionless spinning string invariant under reparametrizions, both local supersymmetry and dilatations, is considered. The density of energy-momentum tensor is constructed and vanishing of its covariant divergence is proved. This result arises from mutual cancellation of the bosonic and fermionic contributions....

💬 0 commentsarXiv:2601.12086v1PDF
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Posted in quant-ph · 2026-01-17 · Yu-Xuan Zhang, Jing-Ling Chen

Peres-type Criterion of Einstein-Podolsky-Rosen Steering for Two Qubits

Quantum nonlocality manifests in multipartite systems through entanglement, Bell's nonlocality, and Einstein-Podolsky-Rosen (EPR) steering. While Peres's positive-partial-transpose criterion provides a simple and powerful test for entanglement, a comparably elegant spectral criterion for detecting EPR steering remains an open...

💬 0 commentsarXiv:2601.12085v1PDF
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Posted in cs.HC · 2026-01-17 · Shiye Cao, Jiwon Moon, Yifan Xu, Anqi Liu, Chien-Ming Huang

Reframing Conversational Design in HRI: Deliberate Design with AI Scaffolds

Large language models (LLMs) have enabled conversational robots to move beyond constrained dialogue toward free-form interaction. However, without context-specific adaptation, generic LLM outputs can be ineffective or inappropriate. This adaptation is often attempted through prompt engineering, which is non-intuitive and tedious....

💬 0 commentsarXiv:2601.12084v1PDF
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Posted in cs.LG · 2026-01-17 · Siru Zhong, Junjie Qiu, Yangyu Wu, Yiqiu Liu, Yuanpeng He, Zhongwen Rao, Bin Yang, Chenjuan Guo, Hao Xu, Yuxuan Liang

Learning to Factorize and Adapt: A Versatile Approach Toward Universal Spatio-Temporal Foundation Models

Spatio-Temporal (ST) Foundation Models (STFMs) promise cross-dataset generalization, yet joint ST pretraining is computationally expensive and grapples with the heterogeneity of domain-specific spatial patterns. Substantially extending our preliminary conference version, we present FactoST-v2, an enhanced factorized framework...

💬 0 commentsarXiv:2601.12083v1PDF
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Posted in cs.CV · 2026-01-17 · Tiffanie Godelaine, Maxime Zanella, Karim El Khoury, Saïd Mahmoudi, Benoît Macq, Christophe De Vleeschouwer

Conditional Random Fields for Interactive Refinement of Histopathological Predictions

Assisting pathologists in the analysis of histopathological images has high clinical value, as it supports cancer detection and staging. In this context, histology foundation models have recently emerged. Among them, Vision-Language Models (VLMs) provide strong yet imperfect zero-shot predictions. We propose to refine these...

💬 0 commentsarXiv:2601.12082v1PDF
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Posted in eess.SY · 2026-01-17 · Tomás Tapia, Yury Dvorkin

Reachability Guarantees for Energy Arbitrage

This paper introduces a unified framework for battery energy arbitrage under uncertain market prices that integrates chance-constrained terminal state-of-charge requirements with online threshold policies. We first cast the multi-interval arbitrage problem as a stochastic dynamic program enhanced by a probabilistic end-of-horizon...

💬 0 commentsarXiv:2601.12081v1PDF
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Posted in cs.CV · 2026-01-17 · Haipeng Zhou, Zhaohu Xing, Hongqiu Wang, Jun Ma, Ping Li, Lei Zhu

Toward Real-World High-Precision Image Matting and Segmentation

High-precision scene parsing tasks, including image matting and dichotomous segmentation, aim to accurately predict masks with extremely fine details (such as hair). Most existing methods focus on salient, single foreground objects. While interactive methods allow for target adjustment, their class-agnostic design restricts...

💬 0 commentsarXiv:2601.12080v1PDF
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Posted in cs.CV · 2026-01-17 · Jing Zhang, Bingjie Fan, Jixiang Zhu, Zhe Wang

EmoLat: Text-driven Image Sentiment Transfer via Emotion Latent Space

We propose EmoLat, a novel emotion latent space that enables fine-grained, text-driven image sentiment transfer by modeling cross-modal correlations between textual semantics and visual emotion features. Within EmoLat, an emotion semantic graph is constructed to capture the relational structure among emotions, objects, and visual...

💬 0 commentsarXiv:2601.12079v1PDF