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arXiv preprints from January 1, 2026 through September 24, 2026 — 04:20:49 EST

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Posted in cond-mat.str-el · 2026-01-20 · Shashank Kumar Ojha, Jyotirmay Maity, Srimanta Middey

When electrons meet ferroelastic domain walls in Strontium Titanate

Strontium titanate (SrTiO$_3$), famously described by Nobel laureate K. A. Müller as the "drosophila of solid-state physics", has been extensively investigated over the last seventy five years for its intricate coupling of structural, electronic, and dielectric properties and continues to serve as a foundational platform for advancing...

💬 0 commentsarXiv:2601.13654v1PDF
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Posted in cs.LG · 2026-01-20 · Xingjian Wu, Junkai Lu, Zhengyu Li, Xiangfei Qiu, Jilin Hu, Chenjuan Guo, Christian S. Jensen, Bin Yang

TimeART: Towards Agentic Time Series Reasoning via Tool-Augmentation

Time series data widely exist in real-world cyber-physical systems. Though analyzing and interpreting them contributes to significant values, e.g, disaster prediction and financial risk control, current workflows mainly rely on human data scientists, which requires significant labor costs and lacks automation. To tackle this, we...

💬 0 commentsarXiv:2601.13653v1PDF
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Posted in astro-ph.SR · 2026-01-20 · Fang-Bin Meng, Li-Ying Zhu, Sheng-Bang Qian, Nian-Ping Liu, Jia Zhang, David Mkrtichian, Soonthornthum Boonrucksar, Er-Gang Zha

HD 26172: an active solar-type subgiant in a close binary system

We present the first comprehensive photometric and spectroscopic analysis of the RS CVn system HD 26172, robustly determining the previously debated evolutionary state of its primary star. Since this system is a single-lined spectroscopic binary with spot-induced light curve modulations, we derived its physical parameters by combining...

💬 0 commentsarXiv:2601.13652v1PDF
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Posted in cs.CV · 2026-01-20 · Marta Moscati, Oleksandr Kats, Mubashir Noman, Muhammad Zaigham Zaheer, Yufang Hou, Markus Schedl, Shah Nawaz

Face-Voice Association with Inductive Bias for Maximum Class Separation

Face-voice association is widely studied in multimodal learning and is approached representing faces and voices with embeddings that are close for a same person and well separated from those of others. Previous work achieved this with loss functions. Recent advancements in classification have shown that the discriminative ability of...

💬 0 commentsarXiv:2601.13651v1PDF
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Posted in cs.CL · 2026-01-20 · Xiaolin Zhou, Zheng Luo, Yicheng Gao, Qixuan Chen, Xiyang Hu, Yue Zhao, Ruishan Liu

Fairness or Fluency? An Investigation into Language Bias of Pairwise LLM-as-a-Judge

Recent advances in Large Language Models (LLMs) have incentivized the development of LLM-as-a-judge, an application of LLMs where they are used as judges to decide the quality of a certain piece of text given a certain context. However, previous studies have demonstrated that LLM-as-a-judge can be biased towards different aspects of...

💬 0 commentsarXiv:2601.13649v1PDF
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Posted in quant-ph · 2026-01-20 · GunSik Min, IlKwon Sohn, Jun Heo

3D Stacked Surface-Code Architecture for Measurement-Free Fault-Tolerant Quantum Error Correction

Mid-circuit measurements are a major bottleneck for superconducting quantum processors because they are slower and noisier than gates. Measurement-free quantum error correction (mfec) replaces repeated measurements and classical feed-forward by coherent quantum feedback, but existing mfec protocols suffer from severe connectivity...

💬 0 commentsarXiv:2601.13648v1PDF
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Posted in cs.SD · 2026-01-20 · Yumin Kim, Seonghyeon Go

Fusion Segment Transformer: Bi-Directional Attention Guided Fusion Network for AI-Generated Music Detection

With the rise of generative AI technology, anyone can now easily create and deploy AI-generated music, which has heightened the need for technical solutions to address copyright and ownership issues. While existing works mainly focused on short-audio, the challenge of full-audio detection, which requires modeling long-term structure...

💬 0 commentsarXiv:2601.13647v1PDF
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Posted in quant-ph · 2026-01-20 · Mingran Zhang, Jiahao Joel Fan, Frank Schlawin, Zhedong Zhang

Theory for Entangled-Photons Stimulated Raman Scattering versus Nonlinear Absorption for Polyatomic Molecules

Quantum entanglement offers an incredible resource for enhancing the sensing and spectroscopic probes. Here we develop a microscopic theory for the stimulated Raman scattering (SRS) using entangled photons. We demonstrate that the time-energy correlation of the photon pairs can optimize the signal for polyatomic molecules. Our results...

💬 0 commentsarXiv:2601.13646v1PDF
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Posted in cs.LG · 2026-01-20 · Euijin You, Hyang-Won Lee

Quadratic Upper Bound for Boosting Robustness

Fast adversarial training (FAT) aims to enhance the robustness of models against adversarial attacks with reduced training time, however, FAT often suffers from compromised robustness due to insufficient exploration of adversarial space. In this paper, we develop a loss function to mitigate the problem of degraded robustness under...

💬 0 commentsarXiv:2601.13645v1PDF
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Posted in cs.CL · 2026-01-20 · Yang Cao, Bicheng Yu, Sikun Yang, Ming Liu, Yujiu Yang

Towards Token-Level Text Anomaly Detection

Despite significant progress in text anomaly detection for web applications such as spam filtering and fake news detection, existing methods are fundamentally limited to document-level analysis, unable to identify which specific parts of a text are anomalous. We introduce token-level anomaly detection, a novel paradigm that enables...

💬 0 commentsarXiv:2601.13644v1PDF
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Posted in math.AG · 2026-01-20 · Shouhei Ma

Borcherds products approximating Gersten complex

For an orthogonal modular variety, we construct a complex which is defined in terms of lattices and elliptic modular forms, which resembles the Gersten complex in Milnor K-theory, and which has a morphism to the Gersten complex of the modular variety by the Borcherds lifting. This provides a formalism for approaching the higher Chow...

💬 0 commentsarXiv:2601.13643v1PDF
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Posted in stat.ML · 2026-01-20 · Yuchen Jiao, Jiin Woo, Gen Li, Gauri Joshi, Yuejie Chi

Sample Complexity of Average-Reward Q-Learning: From Single-agent to Federated Reinforcement Learning

Average-reward reinforcement learning offers a principled framework for long-term decision-making by maximizing the mean reward per time step. Although Q-learning is a widely used model-free algorithm with established sample complexity in discounted and finite-horizon Markov decision processes (MDPs), its theoretical guarantees for...

💬 0 commentsarXiv:2601.13642v1PDF
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Posted in stat.AP · 2026-01-20 · Shuvayan Banerjee, Radhendushka Srivastava, James Saunderson, Ajit Rajwade

Correction of Pooling Matrix Mis-specifications in Compressed Sensing Based Group Testing

Compressed sensing, which involves the reconstruction of sparse signals from an under-determined linear system, has been recently used to solve problems in group testing. In a public health context, group testing aims to determine the health status values of p subjects from n<<p pooled tests, where a pool is defined as a mixture of...

💬 0 commentsarXiv:2601.13641v1PDF
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Posted in hep-ph · 2026-01-20 · Manisha Kumari, Amal Sarkar

Enhanced sensitivity to the $H \to Zγ\to \ell^+\ell^-γ$ decay at the LHC using machine learning and novel kinematic observables

At LHC energies, the Drell--Yan ($Z/γ^{*}$) processes have a substantially large cross section. Their di-lepton ($\ell^+\ell^-$) final state contributes significantly to many resonant signal regions, making them one of the dominant backgrounds in numerous physics analyses. The study focuses on improving the discrimination and...

💬 0 commentsarXiv:2601.13640v2PDF
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Posted in cs.RO · 2026-01-20 · Deyun Qin, Zezhi Liu, Hanqian Luo, Xiao Liang, Yongchun Fang

A General One-Shot Multimodal Active Perception Framework for Robotic Manipulation: Learning to Predict Optimal Viewpoint

Active perception in vision-based robotic manipulation aims to move the camera toward more informative observation viewpoints, thereby providing high-quality perceptual inputs for downstream tasks. Most existing active perception methods rely on iterative optimization, leading to high time and motion costs, and are tightly coupled...

💬 0 commentsarXiv:2601.13639v1PDF
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Posted in cs.CY · 2026-01-20 · Ali Abedi, Charlene H. Chu, Shehroz S. Khan

A longitudinal geospatial multimodal dataset of post-discharge frailty, physiology, mobility, and neighborhoods

Frailty in older adults is associated with increased vulnerability to functional decline, reduced mobility, social isolation, and challenges during the transition from hospital to community living. These factors are associated with rehospitalization and may adversely influence recovery. Neighborhood environments can further shape...

💬 0 commentsarXiv:2602.00060v1PDF
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Posted in physics.app-ph · 2026-01-20 · Benjamin Bradshaw, Amin Hakimi, Filippo Capolino

Steady-State Exceptional Point Degeneracy and Sensitivity of Nonlinear Saturable Coupled Oscillators

A coupled oscillator system displays enhanced sensitivity of its saturated steady-state (SS) oscillation frequency to small parameter perturbations near an exceptional point degeneracy (EPD), a property that can be used to realize EPD-based sensors. Linear $\mathcal{PT}$-symmetric systems, consisting of two coupled resonators, exhibit...

💬 0 commentsarXiv:2601.13638v2PDF
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Posted in math.NA · 2026-01-20 · Mudassir Shams, Andrei Velichko, Bruno Carpentieri

Direct Finite-Time Contraction (Step-Log) Profiling--Driven Optimization of Parallel Schemes for Nonlinear Problems on Multicore Architectures

Efficient computation of all distinct solutions of nonlinear problems is essential in many scientific and engineering applications. Although high-order parallel iterative schemes offer fast convergence, their practical performance is often limited by sensitivity to internal parameters and the lack of reproducible tuning procedures....

💬 0 commentsarXiv:2601.13637v1PDF
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Posted in nucl-th · 2026-01-20 · Kenta Yoshimura, Kazuyuki Sekizawa

Superfluid Band Theory for the Rod Phase in the Magnetized Inner Crust Matter: Entrainment, Spin-orbit Coupling, Spin-triplet Pairing

The inner crust of neutron stars hosts a rich variety of nuclear phenomena and provides a unique environment for exploring microscopic nuclear properties relevant to diverse astrophysical observations. Particularly magnetars, which possess extremely strong magnetic-fields, have attracted increasing attention in connection with nuclear...

💬 0 commentsarXiv:2601.13636v2PDF
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Posted in eess.SP · 2026-01-20 · Emin Akpinar, Emir Aslandogan, Burak Ahmet Ozden, Haci Ilhan, Erdogan Aydin

Deep Learning-Enabled Signal Detection for MIMO-OTFS-Based 6G and Future Wireless Networks

Orthogonal time frequency space (OTFS) modulation stands out as a promising waveform for sixth generation (6G) and beyond wireless communication systems, offering superior performance over conventional methods, particularly in high-mobility scenarios and dispersive channel conditions. Recent research has demonstrated that the reduced...

💬 0 commentsarXiv:2601.13635v1PDF
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Posted in math.AP · 2026-01-20 · Prasanta Chatterjee, Nanda Kanan Pal, Dipan Saha, Santanu Raut

Exact solution of the (2+1)-dimensional damping forcing coupled Burgers equation by using Darboux transformation

In this article, we investigate the (2+1)-dimensional damping forcing coupled Burgers equation, which is obtain by adding damping and forcing terms from couple Burgers equation. The Lax pair of the (2+1)-dimensional damping forcing coupled Burgers equation is established. With the help of Lax pair, we derive the $N$-fold Darboux...

💬 0 commentsarXiv:2601.13634v1PDF
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Posted in cs.CV · 2026-01-20 · Guanqi Zhan, Changye Li, Zhijian Liu, Yao Lu, Yi Wu, Song Han, Ligeng Zhu

EGM: Efficient Visual Grounding Language Models

Visual grounding is an essential capability of Visual Language Models (VLMs) to understand the real physical world. Previous state-of-the-art grounding visual language models usually have large model sizes, making them heavy for deployment and slow for inference. However, we notice that the sizes of visual encoders are nearly the same...

💬 0 commentsarXiv:2601.13633v3PDF
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Posted in cs.AI · 2026-01-20 · Zhiming Xue, Sichen Zhao, Yalun Qi, Xianling Zeng, Zihan Yu

Resilient Routing: Risk-Aware Dynamic Routing in Smart Logistics via Spatiotemporal Graph Learning

With the rapid development of the e-commerce industry, the logistics network is experiencing unprecedented pressure. The traditional static routing strategy most time cannot tolerate the traffic congestion and fluctuating retail demand. In this paper, we propose a Risk-Aware Dynamic Routing(RADR) framework which integrates...

💬 0 commentsarXiv:2601.13632v2PDF
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Posted in cs.AR · 2026-01-20 · Lukas Krupp, Matthew Venn, Norbert Wehn

From RTL to Prompt Coding: Empowering the Next Generation of Chip Designers through LLMs

This paper presents an LLM-based learning platform for chip design education, aiming to make chip design accessible to beginners without overwhelming them with technical complexity. It represents the first educational platform that assists learners holistically across both frontend and backend design. The proposed approach integrates...

💬 0 commentsarXiv:2601.13815v1PDF