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Physics

arXiv preprints from January 1, 2026 through September 8, 2026 — 16:20:18 EST

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Posted in astro-ph.CO · 2026-01-13 · Richard Stiskalek, Harry Desmond, Stuart McAlpine, Guilhem Lavaux, Jens Jasche, Michael J. Hudson

Revisiting the Great Attractor: The Local Group's streamline trajectory, cosmic velocity and dynamical fate

We revisit the Great Attractor using the Manticore-Local suite of digital twins of the nearby Universe. The Great Attractor concept has been proposed as an answer to three distinct questions: what sources the Local Group velocity in the cosmic microwave background frame, where present-day velocity streamlines converge, and where the...

💬 0 commentsarXiv:2601.08524v2PDF
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Posted in physics.app-ph · 2026-01-13 · Nguyen H. Ngo, Weijie Gao, Masayuki Fujita

Advances in All-Silicon Waveguides for Terahertz Integration

In chip-to-chip communication, terahertz waves provide a promising approach to achieve high data capacity with improved energy efficiency, effectively bridging the gap between electrical and optical domains. By realizing this potential, all-dielectric waveguides have emerged as high-speed interconnects, offering broad bandwidth and...

💬 0 commentsarXiv:2601.08515v1PDF
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Posted in astro-ph.SR · 2026-01-13 · Chen Wang, Mike Y. M. Lau, Xiang-Dong Li, Norbert Langer, Selma E. de Mink, Ruggero Valli, Stephen Justham, Xiao-Tian Xu, Jakub Klencki, Taeho Ryu

Thermal-timescale accretion does not always yield critical rotation in mass gainers

Binary evolution plays a central role in producing rapidly rotating stars. Previous studies have shown that mass gainers in binaries can reach critical rotation after accreting only modest amounts of material, particularly during thermal-timescale Case B mass transfer, where tidal spin-down is ineffective due to wide orbits. However,...

💬 0 commentsarXiv:2601.08508v1PDF
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Posted in astro-ph.EP · 2026-01-13 · S. Banerjee, R. K. Choudhary, K. R. Tripathi, T. Imamura, H. Ando

On the estimation of Sulfuric Acid Vapor concentrations below the Venus cloud deck using the Akatsuki Radio Science Experiment

We report new constraints on the vertical distribution of sulfuric acid vapor in the Venusian atmosphere, derived from a refined analysis of radio occultation (RO) data. The method estimates the power spectral density (PSD) of the received signal to recover both the signal intensity and the Doppler shift. The received signal power is...

💬 0 commentsarXiv:2601.08507v1PDF
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Posted in astro-ph.CO · 2026-01-13 · Ósmar Rodríguez, Alejandro Clocchiatti

A new magnitude--redshift relation based on Type Ia supernovae

We present a new empirical relation between the standardized magnitude ($m$) of Type Ia supernovae (SNe Ia) and redshift ($z$). Using Pantheon+ and DES-SN5YR, we find a negative linear correlation between $m-5\log(z(1+z))$ and $z$, implying that their magnitude--redshift relation can be parametrized with just two parameters: an...

💬 0 commentsarXiv:2601.08505v2PDF
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Posted in quant-ph · 2026-01-13 · Francisco Romão, Daniel Vonk, Emmanuil Giortamis, Dennis Sprokholt, Pramod Bhatotia

MultiQ: Multi-Programming Neutral Atom Quantum Architectures

Neutral atom Quantum Processing Units (QPUs) are emerging as a popular quantum computing technology due to their large qubit counts and flexible connectivity. However, performance challenges arise as large circuits experience significant fidelity drops, while small circuits underutilize hardware and face initialization latency issues....

💬 0 commentsarXiv:2601.08504v2PDF
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Posted in hep-ph · 2026-01-13 · Zhi-Peng Xing, Jin Sun, Xiao-Gang He

Decoding the Amplitude Pair with Distinct CPV Phases in Charmed Baryon Decays

In this Letter, we propose a strategy to extract information on the hierarchical amplitude pair in singly Cabibbo-suppressed (SCS) charmed baryon two-body decays, with a dominant amplitude proportional to $λ_s = V_{cs}^* V_{us}$ from tree operators and sub-leading one proportional to $λ_b = V_{cb}^* V_{ub}$ from both penguin and tree...

💬 0 commentsarXiv:2601.08502v2PDF
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Posted in gr-qc · 2026-01-13 · Emel Altas, Bayram Tekin

Geometry is Wavy: Curvature Wave Equations for Generic Affine Connections

Geometry is wavy: even at the purely geometric level (no particular theory chosen), curvature satisfies a covariant quasilinear wave equation. In Riemannian geometry equipped with the Levi-Civita connection, the Riemann curvature tensor obeys a wave equation of the schematic form \[ \Box Riem=\mathcal{Q}(Riem,Riem), \] where...

💬 0 commentsarXiv:2601.08501v2PDF
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Posted in physics.ins-det · 2026-01-13 · Udai Raj Singh, Rajinikumar Ramalingam, Christoph Reinhardt, Olaf Korth, Jörg Penning, Jörn Schaffran, Axel Lindner

Design and construction of a cryogenic subcooler-box for supplying single phase supercritical helium to dark matter and gravitational wave experiments

We report on the design, development, and installation of the ALPS Cryo-Platform Subcooler Box (ACPS), which is part of the cryogenic platform being established in the HERA North Hall at DESY to supply helium for cooling large-scale dark-matter and gravitational-wave experiments with very high heat loads. The ACPS is capable of...

💬 0 commentsarXiv:2601.08496v1PDF
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Posted in quant-ph · 2026-01-13 · Andreas Conta, Santiago Bogino, Frodo Köhncke, Ferdinand Schmidt-Kaler, Ulrich Poschinger

Toolchain for shuttling trapped-ion qubits in segmented traps

Scalable trapped-ion quantum computing requires fast and reliable transport of ions through complex, segmented radiofrequency trap architectures without inducing excessive motional excitation. We present a numerical toolchain for the systematic generation of time-dependent electrode voltages enabling fast, low-excitation ion shuttling...

💬 0 commentsarXiv:2601.08495v1PDF
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Posted in astro-ph.CO · 2026-01-13 · Zhe Li, Chen Yuan, Qing-Guo Huang

One-Loop Tensor Power Spectrum from a Non-Canonical Spectator Field during Inflation

We compute the full one-loop corrections to the primordial tensor power spectrum in an inflationary scenario with a {non-canonical spectator field}, using the in-in formalism. We derive semi-analytic results for the scalar-sourced one-loop tensor spectrum and the effective tensor-to-scalar ratio, $r_{\mathrm{eff}}$. We consider two...

💬 0 commentsarXiv:2601.08675v2PDF
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Posted in physics.optics · 2026-01-13 · Mohamed Sennary, Javier Rivera-Dean, Yihe Wange, Maciej Lewenstein, Mohammed Th. Hassan

Attosecond quantum optics

Modern quantum optics primarily operates in the quasistationary regime, isolated from the intrinsic timescales of ultrafast optical fields. Pushing these boundaries into the femtosecond and attosecond domains is a critical frontier. Here, we generate, shape, and interrogate the quantum state of an ultrafast squeezed light field. Our...

💬 0 commentsarXiv:2601.08671v3PDF
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Posted in nucl-th · 2026-01-13 · N. Susshma, S. Deepa, K. Vijay Sai, R. Gowrishankar

Comment on "Spin-trap isomers in deformed, odd-odd nuclei in the light rare-earth region near N = 98"

Mass spectrometry studies of odd-odd light rare-earth nuclei by Orford et al. [Phys. Rev. C 102, 011303(R) (2020)] suggested the existence of new isomers in the neutron rich isotopes $^{162}$Tb and $^{164}$Tb. More recently, Stryjczyk et al. [Phys. Rev. C 111, 049801 (2025)] commented on the former, citing inconsistencies between the...

💬 0 commentsarXiv:2601.08897v1PDF
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Posted in astro-ph.IM · 2026-01-13 · Jean-Eric Campagne

Blind Deconvolution in Astronomy: How Does a Standalone U-Net Perform?

Aims: This study investigates whether a U-Net architecture can perform standalone end-to-end blind deconvolution of astronomical images without any prior knowledge of the Point Spread Function (PSF) or noise characteristics. Our goal is to evaluate its performance against the number of training images, classical Tikhonov deconvolution...

💬 0 commentsarXiv:2601.08666v1PDF
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Posted in hep-th · 2026-01-13 · A. G. Tsuchiya

On theta function expressions of cyclic products of fermion correlation functions in genus two

In arXiv:2211.09069, significant progress was made in decomposing simple products of fermion correlation functions, and in summing over spin structures of superstring amplitudes in genus two under cyclic constraints. In this manuscript we consider part of the same subject using a framework in which one of the branch points of the...

💬 0 commentsarXiv:2601.08664v3PDF
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Posted in physics.optics · 2026-01-13 · Mario Zitelli

Non-uniform modal power distribution caused by disorder in multimode fibers

The evolution of modal crosstalk in multimode fibers is investigated using four different experimental and numerical approaches. Results converge to demonstrate that the fiber disorder alone is capable of generating steady states characterized by non-uniform modal power distributions, which promote the lower-order modes at the...

💬 0 commentsarXiv:2601.16998v1PDF
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Posted in physics.chem-ph · 2026-01-13 · Kasper F. Schaltz, Jonas Greiner, Filippo Lipparini, Janus J. Eriksen

Solvation Lies Within: Simulating Condensed-Phase Properties from Local Electronic Structures

In transitions between different environmental settings, a molecular system inevitably undergoes a range of detectable changes, and the ability to accurately simulate such responses, e.g., in the form of shifts to molecular energies, remains an important challenge across physical chemistry. Based on an exact decomposition of total...

💬 0 commentsarXiv:2601.08649v1PDF
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Posted in physics.med-ph · 2026-01-13 · Albin Fredriksson, Erik Engwall, Jenneke de Jong, Johan Sundström

Percentile-based probabilistic optimization for systematic and random uncertainties in radiation therapy

Geometric uncertainty can degrade treatment quality in radiation therapy. While margins and robust optimization mitigate these effects, they provide only implicit control over clinical goal fulfillment probability. We therefore develop a probabilistic planning framework using a percentile-based optimization function that targets a...

💬 0 commentsarXiv:2601.08644v1PDF
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Posted in cond-mat.supr-con · 2026-01-13 · Sharadh Jois, Jose L. Lado, Genda Gu, Qiang Li, Ji Ung Lee

Coupling of Klein-Andreev Resonant States in Bi$_2$Sr$_2$CaCu$_2$O$_{8+x}$-graphene-Bi$_2$Sr$_2$CaCu$_2$O$_{8+x}$ Devices

Quantum devices require coherent coupling over macroscopic distances. Recently, resonances due to Klein tunneling and Andreev reflection states (KARS) have been observed in a naturally occurring p-n junction at the interface between Bi$_2$Sr$_2$CaCu$_2$O$_{8+x}$ (BSCCO), a high-Tc superconductor (HTS), and graphene. The resonances...

💬 0 commentsarXiv:2601.08637v1PDF
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Posted in physics.class-ph · 2026-01-13 · R. Dengler

The connection between electromagnetic stress tensors and the dielectric constant in a medium

We perform explicit calculations for microscopic models to confirm that a single, unique electromagnetic stress tensor exists in a dielectric medium: the microscopic tensor $σ^{#}$. We demonstrate that the conventional macroscopic stress tensor of continuum electrodynamics, which contains the derivative of the dielectric coefficient,...

💬 0 commentsarXiv:2601.08635v1PDF
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Posted in astro-ph.GA · 2026-01-13 · Victoria Bollo, Celine Peroux, Martin Zwaan, Jianhang Chen, Varsha Kulkarni, Capucine Barfety, Simon Weng, Natascha Forster Schreiber, Linda Tacconi, Benedetta Casavecchia, Tamsyn O'Beirne, Laurent Chemin, Ramona Augustin, Mitchell Halley

MUSE-ALMA Haloes XIII. Molecular gas in $z \sim 0.5$ HI-selected galaxies

We present new results from the MUSE-ALMA Haloes survey, covering 79 galaxies associated with strong HI absorption at redshift about 0.5. Our ALMA Cycle 10 observations add 39 systems to the initial 21, bringing the total to 60 galaxies. CO emission is detected in 9 new galaxies, and in 12 of 60 total, doubling the number of...

💬 0 commentsarXiv:2601.08633v1PDF
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Posted in gr-qc · 2026-01-13 · Jibril Ben Achour, Adolfo Cisterna, Amaro Díaz, Keanu Müller

Magnetized dynamical black holes

We construct a novel exact solution of the Einstein-scalar-Maxwell equations describing a dynamical black hole immersed in an external, time-dependent electromagnetic field. Motivated by the need for more realistic analytical black hole models, our construction incorporates two key ingredients often neglected in exact solutions: a...

💬 0 commentsarXiv:2601.08628v2PDF
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Posted in astro-ph.EP · 2026-01-13 · Mauro Barbieri, Abraham Loeb

Rare Near-Opposition Alignment of 3I/ATLAS on 22 January, 2026

We point out that on 22 January 2026, the interstellar object 3I/ATLAS will align to within an exceptionally small angle, alpha= 0.69 degrees, with the Earth-Sun axis. This rare alignment provides unique circumstances for measuring the opposition surge and polarimetric properties of interstellar cometary dust. We characterize the...

💬 0 commentsarXiv:2601.08624v1PDF
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Posted in astro-ph.CO · 2026-01-13 · Mattia Cielo, Ema Dimastrogiovanni, Matteo Fasiello, Alexandros Papageorgiou

Primordial Gravitational Waves from Scalar Backreaction in Axion-SU(2) Inflation

In this work, we perform the first numerical study of strong scalar backreaction in spectator chromo-natural inflation (SCNI) in the case where the spectator sector decays during inflation. The tachyonic instability in scalar fluctuations, activated as the system crosses the $m_Q = \sqrt{2}$ threshold, amplifies perturbations and may...

💬 0 commentsarXiv:2601.08622v2PDF
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Posted in cond-mat.str-el · 2026-01-13 · Shuhei Ohyama, Kansei Inamura

Parameterized families of 2+1d $G$-cluster states

We construct a $G$-cluster Hamiltonian in 2+1 dimensions and analyze its properties. This model exhibits a $G\times2\mathrm{Rep}(G)$ symmetry, where the $2\mathrm{Rep}(G)$ sector realizes a non-invertible symmetry obtained by condensing appropriate algebra objects in $\mathrm{Rep}(G)$. Using the symmetry interpolation method, we...

💬 0 commentsarXiv:2601.08616v1PDF