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arXiv preprints from January 1, 2026 through September 7, 2026 — 00:16:05 EST

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Posted in astro-ph.GA · 2026-01-19 · Momoko Makita, Tomoharu Oka, Shiho Tsujimoto, Tatsuya Kotani

Discovery of Multiple Ultra-Broad-Velocity Molecular Features Associated with the W44 Molecular Cloud

We report the discovery of multiple compact molecular features exhibiting extremely broad velocity widths toward the W44 molecular cloud. ALMA CO $J$=3--2 data reveal eight ``Petit--Bullets'' surrounding the previously known ``Bullet.'' Each Petit--Bullet shows a distinct V-shaped structure in position--velocity space, reminiscent of...

💬 0 commentsarXiv:2601.12728v1PDF
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Posted in cond-mat.supr-con · 2026-01-19 · Hui Hu, Zhao Liu, Jia Wang, Xia-Ji Liu

Finite-momentum bound pairs of two electrons in an altermagnetic metal

We solve the two-electron problem on a square lattice with d-wave altermagnetism, considering both on-site and nearest-neighbor attractive interactions. The altermagnetic spin-splitting in the single-particle dispersion naturally gives rise to a ground state of two-electron bound pairs with nonzero center-of-mass momentum. The...

💬 0 commentsarXiv:2601.12905v2PDF
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Posted in cond-mat.str-el · 2026-01-19 · Jiahao Yang, Hao Tian, Si-Yu Pan, Gang v. Chen

Emergent gauge flux and spin ordering in magnetized triangular spin liquids: applications to Hofstadter-Hubbard model

Motivated by the recent progress in the moiré superlattice systems and spin-1/2 triangular lattice antiferromagnets, we revisit the triangular-lattice spin liquids and study their magnetic responses. While the magnetic responses on the ordered phases can be mundane, the orbital magnetic flux and the Zeeman coupling have synergetic...

💬 0 commentsarXiv:2601.12898v1PDF
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Posted in hep-th · 2026-01-19 · Di Wu, Shuang-Qing Wu

Static four-charge squashed black hole in five-dimensional $STU-W^2U$ supergravity and its thermodynamics

In this paper, we present a remarkably simple expression for the exact solution to the $D = 5$, $\mathcal{N} = 2$ supergravity coupled to three vector multiplets with the prepotential $\mathcal{V} = STU -W^2U \equiv 1$, which represents a five-dimensional static Kaluza-Klein black hole with squashed $S^3$ horizons and four independent...

💬 0 commentsarXiv:2601.14315v2PDF
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Posted in cond-mat.mtrl-sci · 2026-01-19 · Weilun Li, Qimu Yuan, Michael B. Johnston, Joanne Etheridge

Discovery of Ferroelectric Twin Boundaries in a Photoactive Halide Perovskite

Halide perovskites have emerged as promising materials for next-generation photovoltaics, laser sources and X-ray detectors. There is intense debate as to whether some photoactive halide perovskites exhibit ferroelectric behaviour and whether it might be possible to utilise the bulk photovoltaic effect to enhance the performance of...

💬 0 commentsarXiv:2601.12892v1PDF
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Posted in cond-mat.mes-hall · 2026-01-19 · Wietze D. Huisman, Sebastiaan L. D. ten Haaf, Chun-Xiao Liu, Qingzhen Wang, Alberto Bordin, Florian J. Bennebroek Evertsz', Bart Roovers, Michael Wimmer, Srijit Goswami

Using Andreev bound states and spin to remove domain walls in a Kitaev chain

Quantum dot-superconductor hybrids have been established as a suitable platform for realizing Kitaev chains hosting Majorana bound states. Implementing these structures in a qubit architecture is expected to result in coherence times that scale exponentially with the lengths of the chains. To scale to longer systems, the phase...

💬 0 commentsarXiv:2601.12891v1PDF
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Posted in gr-qc · 2026-01-19 · S. P. Miao, N. C. Tsamis, R. P. Woodard

Quantum Cosmology in Accelerating Spacetimes II

This paper is a sequel in which we further analyze the recently derived quantum gravity equations which apply in accelerating cosmological spacetimes and whose solutions should be equivalent to all order re-summations of the perturbative leading logarithms that appear. In particular we study their implications concerning the...

💬 0 commentsarXiv:2601.12887v2PDF
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Posted in hep-ph · 2026-01-19 · Quan-Yi Hu

Pseudoscalar meson $P\to τ(\to πν_τ, ρν_τ, \ell \barν_\ell ν_τ) \barν_τ$ decays in the Standard Model and beyond

In this work, we have conducted a comprehensive and systematic theoretical investigation of the full cascade decays of charged pseudoscalar mesons, specifically $D_s$, $D$, $B$, and $B_c$, into $τν_τ$, followed by the subsequent decay of the $τ$ via its dominant experimentally reconstructible channels: $τ\to πν_τ$, $τ\to ρν_τ$, $τ\to...

💬 0 commentsarXiv:2601.12883v2PDF
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Posted in quant-ph · 2026-01-19 · Heng-Na Xiong, Da-Wei Ye, Yang Yang, Hongli Zhu, Yixiao Huang, Stefano Longhi, Fanxin Liu

Exact dynamics and bound states of a cavity coupled to a two-dimensional reservoir

We demonstrate a robust scheme for quantum information storage based on bound states in a two-dimensional coupled-cavity array. When a target cavity is tuned to resonance with the array, a bound state in the continuum (BIC) emerges, coexisting with two conventional bound states outside the band. The resulting dynamics reflects a...

💬 0 commentsarXiv:2601.12880v1PDF
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Posted in hep-th · 2026-01-19 · Ignatios Antoniadis, Marine Samsonyan

Non-perturbative Topological String Partition Function on Twisted Affine Line Bundle over $\mathbb{C}\times T^2$

Using instanton partition function for five dimensional $U(1)$ gauge theory with eight supercharges and a single adjoint massive hypermultiplet on the $Ω$ background, we give explicit expression for non-perturbative corrections to the topological string theory in the holomorphic limit. It was argued that in this case the theory is...

💬 0 commentsarXiv:2601.12877v1PDF
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Posted in physics.soc-ph · 2026-01-19 · Nalin Dhiman

The Physics of the Dancing \emph{Deity}: Coupled Oscillators in Himalayan Processions

In parts of Himachal Pradesh (Kullu and Mandi) and the Western Himalaya, village deities (\emph{devtā}) are carried through the landscape on shoulder-borne palanquins or ``raths.'' Participants often describe these raths as agents: they \emph{choose} routes, signal assent or refusal, and sometimes ``move on their own'' as if people...

💬 0 commentsarXiv:2601.12872v1PDF
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Posted in physics.atom-ph · 2026-01-19 · Yao Yuan, Wang Congyu, Zou Jinpeng, Shi Haosen, Xin Yuqing, Ma Longsheng, Jiang Yanyi

Measurement of Differential Static Polarizability and Frequency of an Inner-Shell Orbital Clock Transition in Lattice-Trapped 174Yb

Additional clock transitions of ytterbium atoms based on inner-shell orbital transition could benefit the search for new physics beyond the Standard Model. Observation of these transitions with high resolution is a prerequisite for making precise frequency measurements. Here, we observe 4.3 Hz-linewidth spectra of the inner-shell...

💬 0 commentsarXiv:2601.12862v1PDF
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Posted in astro-ph.SR · 2026-01-19 · Zhangliang Chen, Hongming Jin, Hongwei Ge, Cong Yu, Kejun Wang, Dichang Chen, Bo Ma

Fates of the sub-stellar objects (FOSSO) I. Fates of the known brown dwarfs in main-sequence--BD binaries

Context. Understanding the survival and orbital evolution of brown dwarf (BD) companions during the post-main-sequence (MS) evolution of their host stars is increasingly important, especially with recent discoveries of many substellar companions around white dwarfs (WDs). Aims. We investigate the long-term evolution and final outcomes...

💬 0 commentsarXiv:2601.12861v2PDF
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Posted in physics.atom-ph · 2026-01-19 · Fan Jia, Zhichao Guo, Zerong Huang, Dajun Wang

Creation of ultracold heteronuclear p-wave Feshbach molecules

We report the first creation of a bulk sample of ultracold heteronuclear p-wave Feshbach molecules in an optically trapped Bose-Bose mixture of 23Na and 87Rb atoms. Using loss spectroscopy and binding energy measurements, we systematically characterize the interspecies p-wave Feshbach resonances near 284 G. Leveraging this...

💬 0 commentsarXiv:2601.12858v5PDF
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Posted in quant-ph · 2026-01-19 · Yao Dong, Xin-Yao Huang, Guo-Feng Zhang

Nonreciprocity of intense light field and weak quantum signal in optomechanical systems with three-mode parametric interactions

We demonstrate nonreciprocal optical transmission for both intense classical fields and weak quantum signals within a reconfigurable optomechanical platform driven by three-mode parametric interactions. The platform is modular, where each three-mode optomechanical system serves as a fundamental building block. Operating independently,...

💬 0 commentsarXiv:2601.12855v1PDF
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Posted in cond-mat.stat-mech · 2026-01-19 · Xiangting Li, Tom Chou

A generalized work theorem for stopped stochastic chemical reaction networks

We establish a generalized work theorem for stochastic chemical reaction networks (CRNs). By using a compensated Poisson jump process, we identify a martingale structure in a generalized entropy defined relative to an auxiliary backward process and extend nonequilibrium work relations to processes stopped at bounded arbitrary times....

💬 0 commentsarXiv:2601.12854v1PDF
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Posted in cond-mat.mes-hall · 2026-01-19 · Wu Heng, Lin Miao-Ling, Yan Sen, Chen Lin-Shang, Zhong-Jie Wang, Zhang Yi-Fei, Zhu Ti-Ying, Su Zheng-Yu, Wang Jun, Liu Xue-Lu Liu, Wei Zhong-Ming, Shi Yan-Meng, Wang Xiang, Ren Bin, Tan Ping-Heng

Plasmonic nanocavity-enabled universal detection of layer-breathing vibrations in two-dimensional materials

Conventional Raman spectroscopy faces inherent limitations in detecting interlayer layer breathing (LB) vibrations with inherently weak electron-phonon coupling or Raman inactivity in two-dimensional materials, hindering insights into interfacial coupling and stacking dynamics. Here we demonstrate a universal plasmon-enhanced Raman...

💬 0 commentsarXiv:2601.12852v1PDF
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Posted in physics.ins-det · 2026-01-19 · Aleksi Suonsivu, Lauri Salmela, Leevi Uosukainen, Edoardo Peretti, Radu Ciprian Bilcu, Giacomo Boracchi

Accurate Simulation Pipeline for Passive Single-Photon Imaging

Single-Photon Avalanche Diodes (SPADs) are new and promising imaging sensors. These sensors are sensitive enough to detect individual photons hitting each pixel, with extreme temporal resolution and without readout noise. Thus, SPADs stand out as an optimal choice for low-light imaging. Due to the high price and limited availability...

💬 0 commentsarXiv:2601.12850v1PDF
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Posted in cond-mat.quant-gas · 2026-01-19 · Ning Liu

Anisotropic dispersion relation of ultralight Bose gases in modified Newtonian dynamics

We investigate the dispersion relation of collective modes in ultralight Bose gases under Modified Newtonian Dynamics (MOND). Starting from the coupled Gross-Pitaevskii and MOND Poisson equations, we derive an anisotropic dispersion relation that depends on the angle between the perturbation wavevector and the background gravitational...

💬 0 commentsarXiv:2601.12848v3PDF
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Posted in hep-th · 2026-01-19 · Sergei Adler, Hermann Boos

Fermionic Basis in Conformal Field Theory: The Free Fermion Point

In this work, we use the master function approach to describe the CFT limit of the six-vertex model at the free fermion point. Using the ODE/IM correspondence, we obtain an explicit form of the master function. This allows us to compute the asymptotic expansion of the function $ω(λ, μ)$ describing the expectation values of the...

💬 0 commentsarXiv:2601.12843v2PDF
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Posted in cond-mat.mtrl-sci · 2026-01-19 · Kun Zheng, Haonan Wang, Ju Chen, Hongxin Cui, Jing Meng, Zheng Li, Cuimei Cao, Haoyu Lin, Yuhao Wang, Keqi Xia, Jiahao Liu, Xiaoyu Feng, Hui Zhang, Bocheng Yu, Jiyuan Li, Yang Xu, Zhengzhong Yang, Shijing Gong, Qingfeng Zhan, Tian Shang

Engineering of Orbital Hybridization: An Exotic Strategy to Manipulate Orbital Current

Current-induced spin-orbit torque (SOT) plays a crucial role in the next-generation spin-orbitronics. Enhancing its efficiency is both fundamentally and practically interesting and remains a challenge to date. Recently, orbital counterparts of spin effects that do not rely on the spin-orbit coupling (SOC) have been found as an...

💬 0 commentsarXiv:2601.12841v1PDF
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Posted in cond-mat.stat-mech · 2026-01-19 · Wang Hao, Meng Yancen, Zhang Kuang, Zhou Rui'en

WH Statistics: Generalized Pauli Principle for Partially Distinguishable Particles

Traditional statistical mechanics is constrained by the binary paradigms of identical/distinguishable and bosonic/fermionic particle statistics, leading to a fundamental logical gap in describing systems with partial distinguishability. We propose WH Statistics, a unified theoretical framework governed by three key parameters:...

💬 0 commentsarXiv:2601.12838v1PDF
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Posted in physics.acc-ph · 2026-01-19 · Kamaljeet Singh, Kangkan Goswami, Raghunath Sahoo, Sumanta Samal

Development of next-generation light-weight ternary Mg--Al--Li alloys for beampipe applications in particle accelerators

The current study reports the design of advanced light-weight materials for high-energy accelerator beampipe applications. The objective is to optimize the combined requirements of high radiation length and stiffness properties of the designed materials. The present study targets conventional beampipe materials such as aluminum,...

💬 0 commentsarXiv:2601.12836v1PDF
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Posted in cond-mat.mes-hall · 2026-01-19 · Monika E. Mycroft, Rostyslav O. Serha, Andrii V. Chumak, Carlos Gonzalez-Ballestero

Quantum State Preparation of Ferromagnetic Magnons by Parametric Driving

We propose a method to prepare and certify Gaussian quantum states of the ferromagnetic resonance spin-wave modes in ferromagnets using a longitudinal drive. Contrary to quantum optics-based strategies, our approach harnesses a purely magnonic feature - the spin-wave nonlinearity - to generate magnon squeezing. This resource is used...

💬 0 commentsarXiv:2601.12833v1PDF