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arXiv preprints from January 1, 2026 through September 13, 2026 — 16:55:45 EST

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Posted in quant-ph · 2026-01-20 · Kazuki Yokomizo, Aashish A. Clerk, Yuto Ashida

Fundamental Limits of Continuous Gaussian Quantum Metrology

Continuous quantum metrology holds promise for realizing high-precision sensing by harnessing information progressively carried away by the radiation quanta emitted into the environment. Despite recent progress, a comprehensive understanding of the fundamental precision limits of continuous metrology with bosonic systems is currently...

💬 0 commentsarXiv:2601.13554v1PDF
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Posted in math.DS · 2026-01-20 · Yusheng Luo, Mahan Mj, Sabyasachi Mukherjee

Universality of the Basilica

We establish universality of the fat Basilica Julia set $J(z^2-\frac34)$ in conformal dynamics in the following sense: $J(z^2-\frac34)$ is quasiconformally equivalent to the fat Basilica Julia set of any polynomial as well as to the limit set of any geometrically finite closed surface Bers boundary group. We thus obtain the first...

💬 0 commentsarXiv:2601.13553v1PDF
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Posted in math.CO · 2026-01-20 · Yufan Luo, Jie Ma, Ziyuan Zhao

Dean's conjecture and cycles modulo k

Dean conjectured three decades ago that every graph with minimum degree at least $k\ge 3$ contains a cycle whose length is divisible by $k$. While the conjecture has been verified for $k\in \{3,4\}$, it remains open for $k\ge 5$. A weaker version, also proposed by Dean, asserting that every $k$-connected graph contains a cycle of...

💬 0 commentsarXiv:2601.13552v1PDF
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Posted in cs.CV · 2026-01-20 · Feng Ding, Wenhui Yi, Xinan He, Mengyao Xiao, Jianfeng Xu, Jianqiang Du

DiffFace-Edit: A Diffusion-Based Facial Dataset for Forgery-Semantic Driven Deepfake Detection Analysis

Generative models now produce imperceptible, fine-grained manipulated faces, posing significant privacy risks. However, existing AI-generated face datasets generally lack focus on samples with fine-grained regional manipulations. Furthermore, no researchers have yet studied the real impact of splice attacks, which occur between real...

💬 0 commentsarXiv:2601.13551v1PDF
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Posted in gr-qc · 2026-01-20 · Yasufumi Kojima, Akira Dohi, Shota Kisaka, Kotaro Fujisawa

Relic of quadrupole deformation produced in a hot neutron star era

A newly born neutron star is expected to exhibit significant deviations from spherical symmetry, which decay with time. Determining how much deformation remains at present is crucial for gravitational-wave astronomy. This study is the first investigation into the evolution of quadrupole deformation during the solid crust formation...

💬 0 commentsarXiv:2601.13550v1PDF
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Posted in eess.SP · 2026-01-20 · Chao Zhou, Changsheng You, Cong Zhou, Chengwen Xing, Jianhua Zhang

Near-field Physical Layer Security: Robust Beamforming under Location Uncertainty

In this paper, we study robust beamforming design for near-field physical-layer-security (PLS) systems, where a base station (BS) equipped with an extremely large-scale array (XL-array) serves multiple near-field legitimate users (Bobs) in the presence of multiple near-field eavesdroppers (Eves). Unlike existing works that mostly...

💬 0 commentsarXiv:2601.13549v1PDF
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Posted in cs.LG · 2026-01-20 · George Wang, Daniel Murfet

Patterning: The Dual of Interpretability

Mechanistic interpretability aims to understand how neural networks generalize beyond their training data by reverse-engineering their internal structures. We introduce patterning as the dual problem: given a desired form of generalization, determine what training data produces it. Our approach is based on susceptibilities, which...

💬 0 commentsarXiv:2601.13548v1PDF
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Posted in cs.CL · 2026-01-20 · Yujia Hu, Roy Ka-Wei Lee

HateXScore: A Metric Suite for Evaluating Reasoning Quality in Hate Speech Explanations

Hateful speech detection is a key component of content moderation, yet current evaluation frameworks rarely assess why a text is deemed hateful. We introduce \textsf{HateXScore}, a four-component metric suite designed to evaluate the reasoning quality of model explanations. It assesses (i) conclusion explicitness, (ii) faithfulness...

💬 0 commentsarXiv:2601.13547v1PDF
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Posted in cs.AI · 2026-01-20 · Hui Sun, Chang Xu, Haonan Xie, Hao Li, Yuhao Huang, Chuheng Zhang, Ming Jin, Xiaoguang Liu, Gang Wang, Jiang Bian

ChatAD: Reasoning-Enhanced Time-Series Anomaly Detection with Multi-Turn Instruction Evolution

LLM-driven Anomaly Detection (AD) helps enhance the understanding and explanatory abilities of anomalous behaviors in Time Series (TS). Existing methods face challenges of inadequate reasoning ability, deficient multi-turn dialogue capability, and narrow generalization. To this end, we 1) propose a multi-agent-based TS Evolution...

💬 0 commentsarXiv:2601.13546v1PDF
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Posted in cs.AI · 2026-01-20 · Shirin Shahabi, Spencer Graham, Haruna Isah

TruthTensor: Evaluating LLMs through Human Imitation on Prediction Market under Drift and Holistic Reasoning

Evaluating language models and AI agents remains fundamentally challenging because static benchmarks fail to capture real-world uncertainty, distribution shift, and the gap between isolated task accuracy and human-aligned decision-making under evolving conditions. This paper introduces TruthTensor, a novel, reproducible evaluation...

💬 0 commentsarXiv:2601.13545v3PDF
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Posted in physics.soc-ph · 2026-01-20 · Li Tuobang

The Collapse of Multilayer Predation and the Emergence of a Monolithic Leviathan

This paper constructs a multilayer recursive game model to demonstrate that in a rule vacuum environment, hierarchical predatory structures inevitably collapse into a monolithic political strongman system due to the conflict between exponentially growing rent dissipation and the rigidity of bottom-level survival constraints. We...

💬 0 commentsarXiv:2601.13544v1PDF
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Posted in physics.comp-ph · 2026-01-20 · Tatsuya Miyata, Shunta Arai, Satoshi Takabe

Refined Gradient-Based Temperature Optimization for the Replica-Exchange Monte-Carlo Method

The replica-exchange Monte-Carlo (RXMC) method is a powerful Markov-chain Monte-Carlo algorithm for sampling from multi-modal distributions, which are challenging for conventional methods. The sampling efficiency of the RXMC method depends highly on the selection of the temperatures, and finding optimal temperatures remains a...

💬 0 commentsarXiv:2601.13542v1PDF
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Posted in math.NA · 2026-01-20 · Yuanhong Wu, Shuzhi Liu, Qinglong Zhang

A hybrid numerical method for a microscopic and macroscopic traffic flow model

In this paper, we introduce a traffic flow model based on a microscopic follow-the-leader model, while enforcing maximal constraints on the density and velocity of the flow. The related macroscopic model can be represented in conservative formulation. By introducing an advected variable up with the flow, where p is the velocity...

💬 0 commentsarXiv:2601.13541v1PDF
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Posted in quant-ph · 2026-01-20 · Zhi Jiao Deng, Xing Yao Mi, Ruo Kun Cai, Chun Wang Wu, Ping Xing Chen

Confined non-Hermitian skin effect in a semi-infinite Fock-state lattice

In this paper, we investigate the non-Hermitian skin effect in a semi-infinite Fock-state lattice, where the inherent coupling scales as \sqrt{n}. By analytically solving a non-uniform, non-reciprocal SSH model, we demonstrate that the intrinsic inhomogeneous coupling, in combination with nonreciprocity, fundamentally modifies the...

💬 0 commentsarXiv:2601.13540v1PDF
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Posted in gr-qc · 2026-01-20 · Nikko John Leo S. Lobos

Phenomenology of Rotating GEUP Black Holes

We investigate the phenomenological implications of quantum gravity on rotating black holes within the framework of the Generalized Extended Uncertainty Principle (GEUP), which incorporates both minimal length (ultraviolet) and large-scale (infrared) corrections. Lacking a full non-perturbative formulation of quantum gravity, we adopt...

💬 0 commentsarXiv:2601.13725v2PDF
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Posted in astro-ph.IM · 2026-01-20 · Arush Pimpalkar, Digvijay Wadekar, Mark Ho-Yeuk Cheung, Emanuele Berti

Sample-efficient non-Gaussian noise reduction in gravitational wave data via learnable wavelets

We introduce $\texttt{WaveletNet}$, a wavelet-based neural network architecture to identify and reduce non-Gaussian noise in gravitational wave data. Traditionally, convolutional neural networks (CNNs) have been widely used as a flexible machine learning method to mitigate non-Gaussian noise. However, training CNNs requires many data...

💬 0 commentsarXiv:2601.14326v2PDF
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Posted in cs.CV · 2026-01-20 · Sam Cantrill, David Ahmedt-Aristizabal, Lars Petersson, Hanna Suominen, Mohammad Ali Armin

Facial Spatiotemporal Graphs: Leveraging the 3D Facial Surface for Remote Physiological Measurement

Facial remote photoplethysmography (rPPG) methods estimate physiological signals by modeling subtle color changes on the 3D facial surface over time. However, existing methods fail to explicitly align their receptive fields with the 3D facial surface-the spatial support of the rPPG signal. To address this, we propose the Facial...

💬 0 commentsarXiv:2601.13724v1PDF
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Posted in cond-mat.str-el · 2026-01-20 · H. Yoshimochi, K. Yoshida, R. Oiwa, T. Nomoto, N. D. Khanh, A. Kitaori, R. Takagi, R. Arita, S. Seki

Large magneto-optical Kerr effect induced by collinear antiferromagnetic order

In modern technology, the optical readout of magnetic information is conventionally achieved by the magneto-optical Kerr effect, i.e., the polarization rotation of reflected light. The Kerr rotation is sensitive to time-reversal symmetry breaking and generally proportional to magnetization, enabling optical readout of the up and down...

💬 0 commentsarXiv:2601.13723v1PDF
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Posted in cs.CL · 2026-01-20 · Caspar Kaiser, Sean Enderby

No Reliable Evidence of Self-Reported Sentience in Small Large Language Models

Whether language models possess sentience has no empirical answer. But whether they believe themselves to be sentient can, in principle, be tested. We do so by querying several open-weights models about their own consciousness, and then verifying their responses using classifiers trained on internal activations. We draw upon three...

💬 0 commentsarXiv:2601.15334v2PDF
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Posted in cs.CL · 2026-01-20 · Yulin Hu, Zimo Long, Jiahe Guo, Xingyu Sui, Xing Fu, Weixiang Zhao, Yanyan Zhao, Bing Qin

OP-Bench: Benchmarking Over-Personalization for Memory-Augmented Personalized Conversational Agents

Memory-augmented conversational agents enable personalized interactions using long-term user memory and have gained substantial traction. However, existing benchmarks primarily focus on whether agents can recall and apply user information, while overlooking whether such personalization is used appropriately. In fact, agents may...

💬 0 commentsarXiv:2601.13722v1PDF
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Posted in cond-mat.mtrl-sci · 2026-01-20 · Bowen Zou, Yixu Wang, Xiao Shen, Philipp Krooss, Thomas Niendorf, Richard Dronskowski, Wenwen Song

Near-atomic investigation on the elemental redistribution during co-precipitation of nano-sized kappa phase and B2 phase in an Al-alloyed lightweight steel

In the present study, correlative transmission Kikuchi diffraction transmission electron microscopy (TKD-TEM) measurements, atom probe tomography (APT), and density functional theory (DFT) calculations are used to reveal the elemental redistribution during co-precipitation of nanosized kappa and B2 phases in an FCC matrix of an Al...

💬 0 commentsarXiv:2601.13721v1PDF
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Posted in math.DS · 2026-01-20 · Sergio Romaña

On the Birkhoff Spectrum for Hyperbolic Dynamics

In this paper, we study the structure of Birkhoff spectra for hyperbolic dynamical systems. Given a Hölder observable \(f\) on a basic set \(Λ\), we obtain the following results: First, we characterize when the Birkhoff spectrum of \(f\) is dense in the positive (or negative) real line. Second, we prove that a bounded Birkhoff...

💬 0 commentsarXiv:2601.13720v2PDF
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Posted in cs.CV · 2026-01-20 · Xinlei Yin, Xiulian Peng, Xiao Li, Zhiwei Xiong, Yan Lu

Hierarchical Long Video Understanding with Audiovisual Entity Cohesion and Agentic Search

Long video understanding presents significant challenges for vision-language models due to extremely long context windows. Existing solutions relying on naive chunking strategies with retrieval-augmented generation, typically suffer from information fragmentation and a loss of global coherence. We present HAVEN, a unified framework...

💬 0 commentsarXiv:2601.13719v2PDF
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Posted in quant-ph · 2026-01-20 · Dinh-Long Vu, Hitomi Mori, Patrick Rebentrost

Quantum Box-Muller Transform

The Box-Muller transform is a widely used method to generate Gaussian samples from uniform samples. Quantum amplitude encoding methods encode the multi-variate normal distribution in the amplitudes of a quantum state. This work presents the Quantum Box-Muller transform which creates a superposition of binary-encoded grid points...

💬 0 commentsarXiv:2601.13718v1PDF