Tootfinder

🪓 Algorithms do widen the divide: Social media feeds shape political polarization
https://english.elpais.com/technology/2025-11-27/algorithms-do-widen-the-divide-social-media-feeds-shape-political-polarizati…

Algorithms do widen the divide: Social media feeds shape political polarization
A study shows that the order in which platforms like X display content to their users affects their animosity towards other ideological groups

Rotation of Polarization Angle in Gamma-Ray Burst Prompt Phase. III. The Influence of the Magnetic Field Orientation
Xing-Yao Wang, Jia-Sheng Li, Mi-Xiang Lan
https://arxiv.org/abs/2510.11971

Rotation of Polarization Angle in Gamma-Ray Burst Prompt Phase. III. The Influence of the Magnetic Field Orientation
Polarization is very sensitive to the configuration of the magnetic field in the radiation region. In addition to polarization curve and polarization spectrum, studies of polarization angle (PA) rotation spectrum is also crucial. In this paper, we use a simple parametric magnetic reconnection model with a large-scale aligned magnetic field in the radiation region to study the effects of field orientation on the PA rotations. Under different field orientations, variations of the PA rotation with…

Classical State Detection Using Quantum State Tomography
Kim Fook Lee, Prem Kumar
https://arxiv.org/abs/2509.11509 https://arxiv.org/pdf/2509.11509

Classical State Detection Using Quantum State Tomography
We present a model to detect a classical state mixed with an idler photon from a polarization-entangled pair. A weak coherent light with a well-defined polarization, matched in wavelength to the idler photon, is injected into the idler channel. Quantum state tomography is then performed on both the classically mixed idler photon and its entangled signal partner. The reconstructed state is modeled as a combination of an $X-$quantum state and a classical-quantum (CQ) state. In this framework, the…

Absorber of Topologically Structured Light
Luka Vignjevic, Eric Plum, Nikitas Papasimakis, Nikolay I Zheludev
https://arxiv.org/abs/2509.10928 https://arxi…

Absorber of Topologically Structured Light
Polarization- and wavelength-sensitive absorbers for homogeneous electromagnetic waves are crucial in photovoltaics, imaging and telecommunications. Here, we report on an absorber selective to the topological structure of light. An electromagnetic beam or pulse containing polarization singularities can be fully dissipated by the absorber, while plane waves are rejected regardless of their polarization. The absorber comprises a conical mirror coaxial with the incident propagating beam, which the…

Polarization from Rapidly Rotating Massive Stars
J. Patrick Harrington, Richard Ignace, Kenneth G. Gayley
https://arxiv.org/abs/2510.12500 https://arxiv.or…

Polarization from Rapidly Rotating Massive Stars
Stellar rotation has long been recognized as important to the evolution of stars, by virtue of the chemical mixing it can induce and how it interacts with binary mass transfer. Binary interaction and rapid rotation are both common in massive stars and involve processes of angular momentum distribution and transport. An important question is how this angular momentum transport leads to the creation of two important classes of rapidly rotating massive stars, Be stars defined by disklike emission …

Horizon-scale variability of from 2017--2021 EHT observations: #EHT Images Reveal Unexpected Polarization Flips at M87*: https://www.mpifr-bonn.mpg.de/pressreleases/2025/6

MIMO Radar Meets Polarization-Reconfigurable Antennas: A BCRB Perspective
Jinpeng Xu, Shuowen Zhang
https://arxiv.org/abs/2510.10235 https://arxiv.org/pdf/…

MIMO Radar Meets Polarization-Reconfigurable Antennas: A BCRB Perspective
In this paper, we investigate a novel multiple-input multiple-output (MIMO) radar system aided by phase shifter based polarization-reconfigurable antennas (PRAs). Specifically, a base station (BS) equipped with multiple PRAs at both the transmitter and the receiver aims to sense the unknown and random angular location parameter of a point target via sending wireless signals and processing the received echo signals reflected by the target, where only prior distribution information about the loca…

Towards polarization-enhanced PET: Study of random background in polarization-correlated Compton events
Ana Marija Ko\v{z}uljevi\'c, Tomislav Bokuli\'c, Darko Gro\v{s}ev, Siddharth Parashari, Luka Paveli\'c, Marinko Rade, Marijan \v{Z}uvi\'c, Mihael Makek
https://arxiv.org/abs/2510.11504

Towards polarization-enhanced PET: Study of random background in polarization-correlated Compton events
Positron Emission Tomography (PET) is a medical imaging modality that utilizes positron-emitting isotopes, such as Ga-68 and F-18, for many diagnostic purposes. The positron annihilates with an electron from the surrounding area, creating two photons of 511 keV energy and opposite momenta, entangled in their orthogonal polarizations. When each photon undergoes a Compton scattering process, the difference of their azimuthal scattering angles reflects the initial orthogonality of their polarizati…

Spin-polarization and diode effect in thermoelectric current through altermagnet-based superconductor heterostructures
Debika Debnath, Arijit Saha, Paramita Dutta
https://arxiv.org/abs/2509.12198

Spin-polarization and diode effect in thermoelectric current through altermagnet-based superconductor heterostructures
The recent advent of a new class of magnetic material named as altermagnet (AM), characterized by a combination of momentum-dependent spin-splitting with zero net magnetization, has opened up promising prospects for spintronic applications. We theoretically explore how the altermagnetic spin-splitting affects the thermoelectric quasiparticle current in AM-based superconducting heterostructures. Our setup comprises of a bilayer system where a $d$-wave AM is proximity coupled to an ordinary $s$-w…

MTOS: A LLM-Driven Multi-topic Opinion Simulation Framework for Exploring Echo Chamber Dynamics
Dingyi Zuo, Hongjie Zhang, Jie Ou, Chaosheng Feng, Shuwan Liu
https://arxiv.org/abs/2510.12423

MTOS: A LLM-Driven Multi-topic Opinion Simulation Framework for Exploring Echo Chamber Dynamics
The polarization of opinions, information segregation, and cognitive biases on social media have attracted significant academic attention. In real-world networks, information often spans multiple interrelated topics, posing challenges for opinion evolution and highlighting the need for frameworks that simulate interactions among topics. Existing studies based on large language models (LLMs) focus largely on single topics, limiting the capture of cognitive transfer in multi-topic, cross-domain c…

Electric Polarization-Driven Modulation of Fe Adatoms on Ferroelectric $\alpha$-In$_2$Se$_3$
Monirul Shaikh, Aleksander L. Wysocki
https://arxiv.org/abs/2510.10405 https://

Electric Polarization-Driven Modulation of Fe Adatoms on Ferroelectric $α$-In$_2$Se$_3$
The interplay among structural, electronic, and magnetic properties of Fe adatoms on the surface of two-dimensional ferroelectric α-In$_2$Se$_3$ is investigated using first-principles electronic structure calculations, with a focus on how these properties are modulated by the direction of the electric polarization of the substrate. We identify two competing adsorption sites for Fe adatoms, whose relative stability depends on the adatom concentration and can be reversed by switching the electri…

Belated #MountainMonday ... Ever been in a place which made you feel you're maybe walking in dream (and it's not a nightmare)? This picture absolutely summarizes why I love the mountains the most in October...
(Had to de-saturate the colors because of polarization filter used, otherwise only slightly cropped and minutely raised shadows)

Understanding the Information Cocoon: A Multidimensional Assessment and Analysis of News Recommendation Systems
Xin Wang, Xiaowen Huang, Jitao Sang
https://arxiv.org/abs/2509.11139

Understanding the Information Cocoon: A Multidimensional Assessment and Analysis of News Recommendation Systems
Personalized news recommendation systems inadvertently create information cocoons--homogeneous information bubbles that reinforce user biases and amplify societal polarization. To address the lack of comprehensive assessment frameworks in prior research, we propose a multidimensional analysis that evaluates cocoons through dual perspectives: (1) Individual homogenization via topic diversity (including the number of topic categories and category information entropy) and click repetition; (2) Gro…

The Curious Case of V CVn
Michael T. Power, Hilding R. Neilson, Galina Sherren
https://arxiv.org/abs/2509.11672 https://arxiv.org/pdf/2509.11672

The Curious Case of V CVn
Decades of observations on the star V Canum Venaticorum (V CVn) have revealed an unusual inverse relationship between its linear polarization and light curves (sometimes with a lead/lag time between them) and an almost constant polarization position angle. One theory proposed to explain this behaviour is the existence of a bow shock driven by a spherically symmetric time-varying dusty wind from the star, which is assumed to vary due to radial pulsations. To test this hypothesis, this study uses…

QEDtool: a Python package for numerical quantum information in quantum electrodynamics
Jesse Smeets, Preslav Asenov, Alessio Serafini
https://arxiv.org/abs/2509.12127 https://…

QEDtool: a Python package for numerical quantum information in quantum electrodynamics
This is the manual of the first version of QEDtool, an object-oriented Python package that performs numerical quantum electrodynamics calculations, with focus on full state reconstruction in the internal degrees of freedom, correlations and entanglement quantification. Our package rests on the evaluation of polarized Feynman amplitudes in the momentum-helicity basis within a relativistic framework. Users can specify both pure and mixed initial scattering states in polarization space. From the s…

Investigation for binary characteristics of LS I 61303 with optical polarization
Jiaxin Liu, Haoyu Yuan, Xiangli Lei, Wenlong Xu, Jumpei Takata, Weihua Lei
https://arxiv.org/abs/2510.10514

Investigation for binary characteristics of LS I+61303 with optical polarization
We investigate the optical linear polarization caused by Thomson scattering of the stellar radiation for gamma-ray binary \lsi61, which likely contains a young pulsar. Based on the pulsar binary scenario, we model the interaction between the pulsar wind and stellar wind from the massive companion star, which creates a shock. To accurately compute the resulting polarization of the stellar wind, we develop a method for the Thomson scattering that accounts for the finite size of the companion star…

Investigation of entanglement in pure final polarization states from neutron-deuteron elastic ccattering and exclusive deuteron break
Henryk Wita{\l}a
https://arxiv.org/abs/2510.10664

Investigation of entanglement in pure final polarization states from neutron-deuteron elastic ccattering and exclusive deuteron break
We investigate the pure polarization states of the outgoing neutron deuteron pair in elastic polarized neutron polarized deuteron scattering, as well as the pure polarization states of the three free nucleons produced in the corresponding deuteron breakup reaction. Our aim is to provide clear evidence of entanglement in their spin degrees of freedom. These final states can be generated from pure spin states of the incoming nd system, where both the neutron and the deuteron are strongly polarize…

Optimization for Massive 3D-RIS Deployment: A Generative Diffusion Model-Based Approach
Kaining Wang, Bo Yang, Zhiwen Yu, Xuelin Cao, M\'erouane Debbah, Chau Yuen
https://arxiv.org/abs/2509.11969

Optimization for Massive 3D-RIS Deployment: A Generative Diffusion Model-Based Approach
Reconfigurable Intelligent Surfaces (RISs) transform the wireless environment by modifying the amplitude, phase, and polarization of incoming waves, significantly improving coverage performance. Notably, optimizing the deployment of RISs becomes vital, but existing optimization methods face challenges such as high computational complexity, limited adaptability to changing environments, and a tendency to converge on local optima. In this paper, we propose to optimize the deployment of large-scal…

Experts fear impact of deepening polarization and perceived political prosecutions (David Rohde/NBC News)
https://www.nbcnews.com/politics/justice-department/experts-fear-impact-deepening-polarization-perceived-political-prosecu-rcna233975
http://www.memeorandum.com/251008/p149#a251008p149

Replaced article(s) found for hep-ex. https://arxiv.org/list/hep-ex/new
[1/1]:
- Cosmic Ray Muon Polarization to Facilitate Atmospheric Neutrino Physics
Ming-Chen Sun, Shi-Han Zhao, Rui-Xuan Gao, He-Sheng Liu, Ai-Yu Bai, Jian Tang

SU(2) gadget for higher-order Poincar\'{e} sphere
Mohammad Umar, Paramasivam Senthilkumaran
https://arxiv.org/abs/2509.10964 https://arxiv.org/pdf/2509…

SU(2) gadget for higher-order Poincaré sphere
The combination of two quarter-wave plates and one half-wave plate, regardless of their sequential arrangement, constitutes a well-established universal SU(2) gadget capable of implementing all polarization transformations on the standard Poincaré sphere. However, there is no analogous system for realizing all polarization transformations on the higher-order Poincaré sphere, a member of a higher topological index space. This work demonstrates that an optical gadget, comprising two quarter-wav…

Bose-Einstein condensates in a spin-twisted harmonic trap
Huaxin He, Fengtao Pang, Xianchao Zhang, Yongping Zhang, Chunlei Qu
https://arxiv.org/abs/2509.11769 https://

Bose-Einstein condensates in a spin-twisted harmonic trap
We investigate the ground-state phases and spin-scissors dynamics of binary Bose-Einstein condensates confined in a twisted two-dimensional harmonic trap. The ground state hosts three distinct phases-phase-separated, polarized, and phase-mixed-determined by the Rabi coupling, interaction ratio G (between inter-component and intra-component interactions), and spin-twisting which induces edge-localized polarization through position-dependent detuning. In the phase-mixed regime, the ground state i…

Comparative Analysis of Polarization in Interstellar Comet #3I/ATLAS with Distant Solar System Comets: https://iopscience.iop.org/article/10.3847/2515-5172/ae0d91 > interview with the first author: https://www.youtube.com/watch?v=F30vaWKywpA

Optically induced orbital polarization in bulk germanium
Francesco Scali, Marco Finazzi, Federico Bottegoni, Carlo Zucchetti
https://arxiv.org/abs/2510.09525 https://

Optically induced orbital polarization in bulk germanium
Optical orientation has been proven as a powerful tool to inject spin-polarized electron and hole populations in III-V and group-IV semiconductors. In particular, the absorption of circularly-polarized light in bulk Ge generates a spin-oriented population of electrons in the conduction band with a spin-polarization up to 50%, whereas the hole spin-polarization, opposite to the electron one, can even reach values up to 83%. In this letter, we theoretically investigate the optical injection of or…

X's location tool shows revenue sharing incentivizes US political content from international sock puppet and bot accounts, making polarization a side hustle (Jason Koebler/404 Media)
https://www.404media.co/americas-polarization-has-become-the-worlds-side…

America’s Polarization Has Become the World's Side Hustle
The 'psyops' revealed by X are entirely the fault of the perverse incentives created by social media monetization programs.

3D B-fieLds in the InterStellar medium and Star-forming regions (3D-BLISS): I. Using Starlight Polarization in Massive IRDC Filament G11.11-0.12
Bao Truong, Thiem Hoang, Nguyen Bich Ngoc, Nguyen Chau Giang, Le Ngoc Tram, Ngan Le
https://arxiv.org/abs/2510.06726

3D B-fieLds in the InterStellar medium and Star-forming regions (3D-BLISS): I. Using Starlight Polarization in Massive IRDC Filament G11.11-0.12
Three-dimensional magnetic fields (3D B-fields) are essential to understand the formation and evolution of the interstellar medium and multi-scale star formation; however, the accurate measurement of 3D B-fields is still challenging. The angle of dust polarization by magnetically aligned grains provides the projected B-fields onto the plane-of-sky, while the degree of dust polarization provides the B-field's inclination angles with respect to the line-of-sight. Our previous theoretical studies …

Competing forces of polarization and confinement generate cellular chirality in a minimal model
Egun Im, Ghina Badih, Laetitia Kurzawa, Andreas Buttensch\"on, Calina Copos
https://arxiv.org/abs/2510.11642

Competing forces of polarization and confinement generate cellular chirality in a minimal model
Left-right axis specification is a vital part of embryonic development that establishes the left and the right sides of an embryo. Asymmetric organ morphogenesis follows asymmetric signaling cascades, which in turn follow asymmetric events on the cellular scale. In a recent study, Badih et al.\ reported cell-scale movement asymmetries in spontaneously rotating pairs of endothelial cells confined to a circular fibronectin-coated island. Importantly, the authors demonstrate that cytoskeletal cont…

On the integrable six-wave interaction system and its space-time shifted reduction
Mark J. Ablowitz, Ramesh Gupta, Ziad H. Musslimani, Nicholas J. Ossi
https://arxiv.org/abs/2510.10312

On the integrable six-wave interaction system and its space-time shifted reduction
The multi-dimensional six-wave interaction system is derived in the context of nonlinear optics. Starting from Maxwell's equations, a reduced system of equations governing the dynamics of the electric and polarization fields are obtained. Using a space-time multi-scale asymptotic expansion, a hierarchy of coupled equations describing the spatio-temporal evolution of the perturbed electric and polarization fields are derived. The leading order equation admits a six-wave ansatz satisfying a triad…

X's location tool shows revenue sharing incentivizes US political content from international sock puppet and bot accounts, making polarization a side hustle (Jason Koebler/404 Media)
https://www.404media.co/americas-polarization-has-become-the-worlds-side…

America’s Polarization Has Become the World's Side Hustle
The 'psyops' revealed by X are entirely the fault of the perverse incentives created by social media monetization programs.

Cross-Polarization Reduction in Kinetic Inductance Detectors Based on Quasi-Lumped Resonators
Victor Rollano, Martino Calvo, Alejandro Pascual Laguna, David Rodriguez, Maria Teresa Magaz, Beatriz Aja, Luisa de la Fuente, Daniel Granados, Alessandro Monfardini, Alicia Gomez
https://arxiv.org/abs/2510.01882

Cross-Polarization Reduction in Kinetic Inductance Detectors Based on Quasi-Lumped Resonators
Kinetic Inductance Detectors (KIDs) have emerged as a leading technology for millimeter- and submillimeter-wave astronomy due to their high sensitivity, natural multiplexing capabilities and scalable fabrication. In polarization-sensitive applications-such as Cosmic Microwave Background (CMB) studies-cross-polarization, or unintended response to the orthogonal polarization, poses a significant limitation to measurement fidelity. This work investigates the origin of cross-polarization in meander…

🤦🏻 Golf lesson: Study shows political polarization hurts performance at work
#politics

Golf lesson: Study shows political polarization hurts performance at work
Few workers face more scrutiny than professional athletes. Every movement is measured, every outcome quantified, and every performance evaluated against objective standards. So when UC Berkeley Haas researcher Tim Sels wondered how America's deepening political polarization was affecting workers' performance, he turned to one of the most comprehensive data sets on individual human performance: the PGA Tour.

Polarization Dependence of Excess Loss of Amorphous Coating Supermirror in Optical Region for Cavity Ringdown Spectroscopy
Mitsunori Araki, Kohsuke Suma
https://arxiv.org/abs/2510.09053

Polarization Dependence of Excess Loss of Amorphous Coating Supermirror in Optical Region for Cavity Ringdown Spectroscopy
A long optical path length is critical in achieving sensitive spectroscopy. For cavity ringdown spectroscopy, a cavity consisting of two supermirrors provides a long path length, where high reflectance of the supermirrors results from their slight excess loss. In the case of a crystal coating supermirror, the excess loss has been suggested to depend on polarization. On the other hand, an amorphous coating supermirror was expected to have a negligible polarization dependence. In this work, we me…

Three new NERDS publications: Polarization, image-to-text-mapping, and candidate recommendation
https://nerds.itu.dk/2025/09/30/three-new-nerds-publications-polarization-image-candidate/

Investigating the relationship between the Weyl semimetal phase and the three-dimensional quantum Hall phase in ZrTe$_5$
Jiahao Chen, Yu Cao, Hong Du, Yuanze Li, Ruidan Zhong, Tian Liang
https://arxiv.org/abs/2510.12361

Investigating the relationship between the Weyl semimetal phase and the three-dimensional quantum Hall phase in ZrTe$_5$
The material ZrTe$_5$ exhibits distinct topological phases, including a Weyl semimetal phase, characterized by a chiral anomaly and in-plane Hall effect, and a three-dimensional quantum Hall phase. The relationship between these phases remains poorly understood. This work systematically explores their connection in ZrTe$_5$ through rotatable, pressure-dependent measurements. At ambient pressure, both phases are observed; the WSM phase requires strong electronic polarization, while the 3D QH pha…

Lepton polarization dependent angular observables and the polarization asymmetries in the four-fold $\Lambda_b \rightarrow \Lambda(\rightarrow N \pi) \ell^ \ell^-$ decay
Rana Khan, Faisal Munir Bhutta, Ishtiaq Ahmed, M. Jamil Aslam
https://arxiv.org/abs/2510.00249

Lepton polarization dependent angular observables and the polarization asymmetries in the four-fold $Λ_b \rightarrow Λ(\rightarrow N π) \ell^+\ell^-$ decay
The rare decays mediated by flavor-changing neutral current processes, such as $b \to s \ell^{+}\ell^{-}$, provide powerful probes of the Standard Model and potential windows into new physics. Particularly, the angular observables in these exclusive decays are valuable because of their sensitivity to short-distance dynamics and their reduced dependence on hadronic uncertainties, which mainly arise from form factors. In this work, we analyze the $Λ_b \to Λ(\to Nπ)\ell^{+}\ell^{-}$ (with $Nπ=…

💢 How do drivers react to partisan bumper stickers? Understanding polarization in apolitical settings
#science

Frontiers | How do drivers react to partisan bumper stickers? Understanding polarization in apolitical settings
IntroductionThe impact of political polarization is no longer confined to the voting booth, and partisan identity can shape behavior even in seemingly apolit...

The polarization problem for the honeycomb structure
Markus Faulhuber
https://arxiv.org/abs/2509.24687 https://arxiv.org/pdf/2509.24687

The polarization problem for the honeycomb structure
We study the polarization problem in dimension 2 for the honeycomb structure and compare it to the maximal polarization lattice, the hexagonal lattice. As expected, the hexagonal lattice has higher polarization than the honeycomb at all densities.

Impact of Force Field Polarization on Correlated Motions of Proteins
Ana Milinski (IGBMC), Annick Dejaegere (IGBMC), Roland Stote (IGBMC)
https://arxiv.org/abs/2510.04897 https:…

Impact of Force Field Polarization on Correlated Motions of Proteins
Correlated motions of proteins underpin many physiological mechanisms, such as substrate binding, signal transduction, enzymatic activity and allostery. These motions arise from low frequency collective movements of biomolecules and have mostly been studied using molecular dynamics simulations. Here, we present the effects of two different empirical energy force fields used for molecular dynamics simulations on correlated motions -- the non-polarizable CHARMM 36m additive force field and the po…

Skyrmionic polarization textures in structured dielectric planar media
Francesco Di Colandrea, Lorenzo Marrucci, Filippo Cardano
https://arxiv.org/abs/2510.09427 https://…

Skyrmionic polarization textures in structured dielectric planar media
Skyrmionic patterns of optical fields have recently emerged across diverse photonic platforms. Here, we show that such textures also arise in the polarization eigenstates of light propagation through flat dielectric devices with an engineered, space-dependent optic-axis orientation. We focus on two-dimensional periodic structures, where propagation through multiple devices maps onto quantum dynamics on a synthetic optical lattice. Adopting the condensed-matter framework, a spatial period define…

America’s Polarization Has Become the World's Side Hustle https://www.404media.co/americas-polarization-has-become-the-worlds-side-hustle/

On the statistical characterization of the synchrotron multi-zone polarization of blazars
Andrea Tramacere
https://arxiv.org/abs/2510.05324 https://arxiv.o…

On the statistical characterization of the synchrotron multi-zone polarization of blazars
Multiwavelength polarimetric observations of blazars reveal complex, energy-dependent polarization behavior, including a decrease in polarization fraction from X-rays to millimeter bands and significant variability in the electric vector position angle (EVPA). These trends challenge simple single-zone synchrotron models and suggest a more intricate, turbulent jet structure with multiple emission zones. We develop a statistical framework to model the observed energy-dependent polarization patter…

Constraining Inflationary Particle Production with CMB Polarization
Luca H. Abu El-Haj, Oliver H. E. Philcox, J. Colin Hill
https://arxiv.org/abs/2509.23123 https://

Constraining Inflationary Particle Production with CMB Polarization
Inflation generates correlated temperature ($T$) and polarization ($E$-mode) fluctuations in the cosmic microwave background (CMB), which differ only by their transfer functions. Following Philcox et al. (2025), we investigate a scenario with a massive partner to the inflaton ($\mathcal{O}(100)$ times the inflationary Hubble scale), in which particles are produced during a narrow time period, leaving characteristic hot- or cold-spots in the CMB. Using tools developed for thermal Sunyaev-Zel'dov…

Spectropolarimetry of NGC 1275 reveals a narrow-line radio galaxy with polarization parallel to its radio jet axis
F. Marin, T. Pursimo, I. Liodakis, E. Lindfors, J. Biedermann, D. Hutsem\'ekers, M. Turkki
https://arxiv.org/abs/2510.06713

Spectropolarimetry of NGC 1275 reveals a narrow-line radio galaxy with polarization parallel to its radio jet axis
Concomitant with the Imaging X-ray Polarimetry Explorer (IXPE) observation of the Perseus cluster, we obtained optical spectropolarimetry of its central active galactic nucleus, NGC 1275, using the Alhambra Faint Object Spectrograph and Camera (ALFOSC) on the Nordic Optical Telescope (NOT). While the total-light spectrum confirms its edge-on, core obscured (type-2) classification, the polarized spectrum shows a polarization angle aligned with the arcsecond radio jet axis -- an exceptional behav…

Polarization at millimeter wavelengths caused by drifting grains in protoplanetary disks
Moritz Lietzow-Sinjen, Stefan Reissl, Mario Flock, Sebastian Wolf
https://arxiv.org/abs/2509.24594

Polarization at millimeter wavelengths caused by drifting grains in protoplanetary disks
During the evolution of protoplanetary disks, dust grains start to grow, form larger particles, settle to the midplane, and rearrange the disk, mainly by the inward radial drift. Because of this, dust pebbles with an irregular shape usually align mechanically and thus cause polarization signatures in their thermal radiation due to dichroic emission or absorption. The goal of this paper is to evaluate the potential to trace the impact of mechanical grain alignment in protoplanetary disks on the …

Spinning Mellin amplitudes
Zhongjie Huang, Yichao Tang
https://arxiv.org/abs/2510.07388 https://arxiv.org/pdf/2510.07388

Spinning Mellin amplitudes
We propose a definition of Mellin amplitudes for conformal correlators involving arbitrary spinning operators in tensor representations of the Lorentz group. These representations cover all bosonic local operators. Our strategy is to perform discrete Mellin transforms on all scalar products involving polarization vectors, so that each polarization vector can be interpreted as the position of a fictitious scalar operator. We establish the general pole structures and factorization properties of t…

Polarization dependence of spin-electric transitions in molecular exchange qubits
Filippo Troiani, Athanassios K. Boudalis
https://arxiv.org/abs/2510.03099 https://

Polarization dependence of spin-electric transitions in molecular exchange qubits
Quasi-optical experiments are emerging as a powerful technique to probe magnetic transitions in molecular spin systems. However, the simultaneous presence of the electric- and magnetic-dipole induced transitions poses the challenge of discriminating between these two contributions. Besides, the identification of the spin-electric transitions can hardly rely on the peak intensity, because of the current uncertainties on the value of the spin-electric coupling in most molecular compounds. Here, w…

Strain-induced multiferroicity in Cr1/3NbS2
Y. Sun, Y. Ahn, D. Sapkota, H. S. Arachchige, R. Xue, S. Mozaffari, D. G. Mandrus, L. Zhao, J. Orenstein, V. Sunko
https://arxiv.org/abs/2510.11619

Strain-induced multiferroicity in Cr1/3NbS2
Multiferroic materials, in which electric polarization and magnetic order coexist and couple, offer rich opportunities for both fundamental discovery and technology. However, multiferroicity remains rare due to conflicting electronic requirements for ferroelectricity and magnetism. One route to circumvent this challenge is to exploit the noncollinear ordering of spin cycloids, whose symmetry permits the emergence of polar order. In this work, we introduce another pathway to multiferroic order i…

A fiber-loop laser with a cooled erbium-doped section
Eyal Buks, Boris A. Malomed
https://arxiv.org/abs/2509.11262 https://arxiv.org/pdf/2509.11262

A fiber-loop laser with a cooled erbium-doped section
An optical comb featuring an unusual structure has been recently observed in a fiber-loop laser running at cryogenic temperatures. In the present work, the effect of optical polarization on the operation of the laser is explored. Multi--mode lasing with a relatively high degree of inter--mode coherency is experimentally demonstrated. The setup can be used for applications to spectroscopy, communications, and quantum data storage.

Persistence of Deuterium and Tritium Nuclear Spin-Polarization in Presence of High-Frequency Plasma Waves
J. W. S. Cook, H. Ali, J. F. Parisi, A. Diallo, N. Faatz
https://arxiv.org/abs/2509.25506

Persistence of Deuterium and Tritium Nuclear Spin-Polarization in Presence of High-Frequency Plasma Waves
We present first-principles numerical calculations of the depolarization rate of spin-polarized deuterium and tritium nuclei in realistic tokamak plasmas, driven by resonant interactions with plasma waves. Backed up by first-of-a-kind linear and nonlinear simulations, we find that alpha particle-driven Alfvénic modes cause only negligible depolarization, which is contrary to expectations in prior literature. Other Alfvénic instabilities can in principle degrade polarization, but only under co…

Optical Link Tomography: First Field Trial and 4D Extension
Takeo Sasai, Giacomo Borraccini, Yue-Kai Huang, Hideki Nishizawa, Zehao Wang, Tingjun Chen, Yoshiaki Sone, Minami Takahashi, Tatsuya Matsumura, Masanori Nakamura, Etsushi Yamazaki, Koichi Takasugi, Ting Wang, Yoshiaki Kisaka
https://arxiv.org/abs/2510.09384

Optical Link Tomography: First Field Trial and 4D Extension
Optical link tomography (OLT) is a rapidly evolving field that allows the multi-span, end-to-end visualization of optical power along fiber links in multiple dimensions from network endpoints, solely by processing signals received at coherent receivers. This paper has two objectives: (1) to report the first field trial of OLT, using a commercial transponder under standard DWDM transmission, and (2) to extend its capability to visualize across 4D (distance, time, frequency, and polarization), al…

Campaign-spending driven polarization transition in a double-random field model of elections
Jan Korbel, Remah Dahdoul, Stefan Thurner
https://arxiv.org/abs/2510.00612 https://

Campaign-spending driven polarization transition in a double-random field model of elections
We model bipartisan elections where voters are exposed to two forces: local homophilic interactions and external influence from two political campaigns. The model is mathematically equivalent to the random field Ising model with a bimodal field. When both parties exceed a critical campaign spending, the system undergoes a phase transition to a highly polarized state where homophilic influence becomes negligible, and election outcomes mirror the proportion of voters aligned with each campaign, i…

Riemann-Silberstein geometric phase for high-dimensional light manipulation
Yuqiong Cheng, Yuan-Song Zeng, Wanyue Xiao, Tong Fu, Jiajun Wu, Geng-Bo Wu, Din Ping Tsai, Shubo Wang
https://arxiv.org/abs/2510.09112

Riemann-Silberstein geometric phase for high-dimensional light manipulation
Geometric phases provide a powerful mechanism for light manipulation. In particular, the Pancharatnam-Berry (PB) phase has enabled optical metasurfaces with broad applications. However, the PB phase is based on polarization evolution in a two-dimensional space, which fails to account for other polarization degrees of freedom. Here, we generalize the concept of geometric phase to a four-dimensional (4D) Riemann-Silberstein (RS) space that characterizes the complete electromagnetic polarization, …

General model and modulation strategies for Sagnac-based encoders
Federico Berra, Mat\'ias Rub\'en Bola\~nos, Alberto De Toni, Kannan Vijayadharan, Costantino Agnesi, Marco Avesani, Andrea Stanco, Paolo Villoresi, Giuseppe Vallone
https://arxiv.org/abs/2510.11873

General model and modulation strategies for Sagnac-based encoders
In recent decades, there has been an increasing demand for faster modulation schemes. Electro-optic modulators are essential components in modern photonic systems, enabling high-speed control of light for applications ranging from telecommunications to quantum communication. Conventional inline and Mach-Zehnder modulators, while widely adopted, are limited by bias drift, high operating voltages, and polarization-mode dispersion. Sagnac loop-based modulators have recently emerged as a promising …

Elliptical Polarization in Partial Wave Analysis of Two Spinless Meson Photoproduction
Derek I. Glazier, Vincent Mathieu
https://arxiv.org/abs/2509.18827 https://

Spin polarization engineering in $d$-wave altermagnets
Mohsen Yarmohammadi, Marco Berritta, Marin Bukov, Libor \v{S}mejkal, Jacob Linder, Peter M. Oppeneer
https://arxiv.org/abs/2510.02452

Spin polarization engineering in $d$-wave altermagnets
Altermagnets host unconventional spin-polarized bands despite zero net magnetization, but controlling their spin structure remains challenging. We propose a multi-field approach to engineer spin polarization in $d$-wave altermagnets using gating, optical driving, and in-plane electric fields, which enable tunable and switchable polarizations along multiple directions. Optical driving induces out-of-plane ($z$) polarization, while gating and in-plane fields generate $x$- and $y$-polarizations vi…

Measurement of transverse polarization of $\Lambda$ and $\bar{\Lambda}$ hyperons inside jets in $pp$ collisions at $\sqrt{s}=200$ GeV
The STAR collaboration
https://arxiv.org/abs/2509.17487

Measurement of transverse polarization of $Λ$ and $\barΛ$ hyperons inside jets in $pp$ collisions at $\sqrt{s}=200$ GeV
We report the first measurement of $Λ$ and $\overlineΛ$ transverse polarization inside jets in unpolarized proton-proton collisions, which is attributed to the polarizing fragmentation function (PFF). The polarization is measured as a function of the jet transverse momentum ($p_{\text{T}}$), the fraction of the jet momentum carried by $Λ$($\overlineΛ$) hyperons, and the transverse momentum of $Λ\:(\overlineΛ)$ hyperons relative to the jet axis. $Λ$ polarization shows a clear dependence o…

SOFIA Polarization Spectrum of Three Star-Forming Clouds
Erin G. Cox, Giles Novak, David T. Chuss, Dennis Lee, Marc Berthoud, Kaitlyn Karpovich, Joseph M. Michail, Zhi-Yun Li, Peter C. Ashton
https://arxiv.org/abs/2509.13416

SOFIA Polarization Spectrum of Three Star-Forming Clouds
The dust emission polarization spectrum -- how the polarization percentage changes with wavelength -- serves as a probe of dust grain properties in star-forming regions. In this paper, we present 89 $μ$m - 214 $μ$m polarization spectrum measurements obtained from SOFIA/HAWC+ for three star-forming clouds -- OMC1, M17, and W3. We find that all three clouds have an overall decreasing polarization percentage with increasing wavelength (i.e., a ``falling polarization spectrum''). We use SOFIA and…

Probing the Topology of the Early Universe using CMB Temperature and Polarization Anisotropies
Miguel-Angel Sanchis-Lozano
https://arxiv.org/abs/2509.22106 https://

Probing the Topology of the Early Universe using CMB Temperature and Polarization Anisotropies
The temperature and polarization of the cosmic microwave background (CMB), as measured today, may offer key insights into the topology of the early universe prior to inflation, for example, by discriminating between flat and warped geometries. In this paper, we focus on a Kaluza-Klein model with an extra spatial dimension that compactifies at the Grand Unified Theory (GUT) epoch, subject to mixed Neumann/Dirichlet boundary conditions at fixed points. As a consequence, a set of infrared cutoffs …

Probing the formation of megaparsec-scale giant radio galaxies II. Continuum & polarization behavior from MHD simulations
Gourab Giri, Christian Fendt, Joydeep Bagchi, Kshitij Thorat, D. J. Saikia, Roger P. Deane, Jacinta Delhaize
https://arxiv.org/abs/2510.03037

Probing the formation of megaparsec-scale giant radio galaxies II. Continuum & polarization behavior from MHD simulations
The persistence of radiative signatures in giant radio galaxies remains a frontier topic of research, with contemporary telescopes revealing intricate features that require investigation. This study aims to examine the emission characteristics of simulated GRGs, and correlate them with their underlying 3D dynamical properties. Sky-projected continuum and polarization maps at 1 GHz were computed from five 3D-RMHD simulations by integrating the synthesized emissivity data along the line of sight,…

Generation of C-band entangled photon pairs by biexciton-exciton cascade from symmetric InAs/InP quantum dots
Anna Musia{\l}, Maja Wasiluk, Katarzyna Roszak, Micha{\l} Gawe{\l}czyk, Wojciech Rudno-Rudzi\'nski, Pawe{\l} Wyborski, Johann P. Reithmaier, Mohamed Benyoucef, Grzegorz S\k{e}k
https://arxiv.org/abs/2509.24500

Generation of C-band entangled photon pairs by biexciton-exciton cascade from symmetric InAs/InP quantum dots
Hereby, we study the generation of pairs of polarization-entangled photons at telecom C-band by biexciton-exciton cascade from non-resonantly excited epitaxial InAs/InP quantum dots (QDs). It is realized without external tuning of the fine structure splitting (FSS), which does not exceed 10 $μ$eV in as-grown nanostructures, due to their high in-plane symmetry. Excitonic complexes are identified by means of excitation power-dependent and polarization-resolved magneto)microphotoluminescence. The…

Stanford researchers develop a web-based tool that uses an LLM to downrank X posts with antagonistic language in a user's feed, to reduce "partisan animosity" (Stanford University)
https://news.stanford.edu/stories/2025/11/social-m…

N 2 Mapmaking for Polarized CMB Experiments
M. Galloway, H. K. Eriksen, R. M. Sullivan, D. J. Watts, I. K. Wehus, L. Zapelli
https://arxiv.org/abs/2509.22322 https://

N+2 Mapmaking for Polarized CMB Experiments
We introduce N+2 mapmaking as a novel approach to constructing maps in both intensity and polarization for multi-detector CMB data. The motivation behind this method is two-fold: Firstly, it provides individual temperature detector maps from a multi-detector set, which may be useful for component separation purposes, in particular for line emission reconstruction. Secondly, it simultaneously outputs coadded polarization maps with minimal temperature-to-polarization leakage sensitivity. Algorith…

😠 Polarization fluctuates around political events, study shows
#politics…

Polarization fluctuates around political events, study shows
Political elites in the US are ideologically divided over climate change. A new paper identifies two perspectives:

The detection of high X-ray polarization from an accretion disc corona source and its modelling via Monte Carlo radiation transfer simulation
Ryota Tomaru, Chris Done, Hirokazu Odaka
https://arxiv.org/abs/2509.26147

The detection of high X-ray polarization from an accretion disc corona source and its modelling via Monte Carlo radiation transfer simulation
We report an X-ray polarization degree (PD) of $8.8\pm1.4\%~(1σ)$ from the accretion-disc-corona (ADC) neutron-star system 2S 0921-630 (=V395 Car) observed with the Imaging X-ray Polarimetry Explorer (IXPE). The PD increases with energy, while the polarization angle (PA) varies significantly across the band. These trends are consistent with a high-inclination ADC geometry where the vertically extended disc blocks direct sight of the central X-ray source, and the observed X-rays are those scatt…

Phase transitions and polarization switching in quasi-one-dimensional organic ferroelectrics of phenyltetrazole family
A. P. Moina
https://arxiv.org/abs/2509.23526 https://

Phase transitions and polarization switching in quasi-one-dimensional organic ferroelectrics of phenyltetrazole family
Pseudospin models are proposed for description of the phase transitions, dielectric characteristics, and polarization switching in two crystals of the phenyltetrazole family. One of them, APHTZ, is a canted ferroelectric, whereas the other, MPHTZ is a simple antiferroelectric. In APHTZ the electric field, applied perpendicularly to the axis of spontaneous polarization, flips the polarization in one of the two sublattices, effectively rotating the non-zero net polarization by 90$^\circ$ and swit…

Shifts in U.S. Social Media Use, 2020-2024: Decline, Fragmentation, and Enduring Polarization (Petter Törnberg/arXiv.org)
https://arxiv.org/abs/2510.25417
http://www.memeorandum.com/251030/p48#a251030p48

FIELDMAPS Data Release: Far-Infrared Polarization in the "Bones" of the Milky Way
Simon Coud\'e, Ian W. Stephens, Philip C. Myers, Nicole Karnath, Howard A. Smith, Andr\'es Guzm\'an, Jessy Marin, Catherine Zucker, B-G. Andersson, Zhi-Yun Li, Leslie W. Looney, Giles Novak, Thushara G. S. Pillai, Sarah I. Sadavoy, Patricio Sanhueza, Archana Soam

FIELDMAPS Data Release: Far-Infrared Polarization in the "Bones" of the Milky Way
Polarization observations of the Milky Way and many other spiral galaxies have found a close correspondence between the orientation of spiral arms and magnetic field lines on scales of hundreds of parsecs. This paper presents polarization measurements at 214 $μ$m toward ten filamentary candidate ``bones" in the Milky Way using the High-resolution Airborne Wide-band Camera (HAWC+) on the Stratospheric Observatory for Infrared Astronomy (SOFIA). These data were taken as part of the Filaments Ext…

Coupled opinion-environmental dynamics in polarized and prejudiced populations
Cameron Kerr, Madhur Anand, Chris T Bauch
https://arxiv.org/abs/2510.06237 https://

Coupled opinion-environmental dynamics in polarized and prejudiced populations
Public opinion on environmental issues remains polarized in many countries, posing a significant barrier to the implementation of effective policies. Behind this polarization, empirical studies have identified social susceptibility, personal prejudice, and personal experience as dominant factors in opinion formation on environmental issues. However, current coupled human-environment models have not yet incorporated all three factors in polarized populations. We developed a stylized coupled huma…

Chasing Anharmonicities in Polarization-Orientation Raman Spectra of Acene Crystals with Machine Learning
Paolo Lazzaroni, Shubham Sharma, Mariana Rossi
https://arxiv.org/abs/2510.04843

Chasing Anharmonicities in Polarization-Orientation Raman Spectra of Acene Crystals with Machine Learning
We present a first-principles machine-learning computational framework to investigate anharmonic effects in polarization-orientation (PO) Raman spectra of molecular crystals, focusing on anthracene and naphthalene. By combining machine learning models for interatomic potentials and polarizability tensors, we enable efficient, large-scale simulations that capture temperature-dependent vibrational dynamics beyond the harmonic approximation. Our approach reproduces key qualitative features observe…

Tensor Spin Polarization Induced by Curved Freeze-Out Hypersurface
Zhong-Hua Zhang, Xu-Guang Huang
https://arxiv.org/abs/2509.20200 https://arxiv.org/pdf/2…

Tensor Spin Polarization Induced by Curved Freeze-Out Hypersurface
We investigate how the curvature of the freeze-out hypersurface polarizes massive vector bosons in relativistic heavy-ion collisions. Starting from the Proca Lagrangian and using the Wigner function formalism, we perform a systematic gradient expansion to obtain a covariant spin-polarization tensor expressed in terms of hydrodynamic fields and the curvature tensor of the freeze-out hypersurface. Analytic results for Bjorken and Gubser flows show that curvature anisotropy generates a non-zero te…

Cleaning Galactic foregrounds with spatially varying spectral dependence from CMB observations with \texttt{fgbuster}
Arianna Rizzieri, Cl\'ement Leloup, Josquin Errard, Davide Poletti
https://arxiv.org/abs/2510.08534

Cleaning Galactic foregrounds with spatially varying spectral dependence from CMB observations with \texttt{fgbuster}
In the context of maximum-likelihood parametric component separation for next-generation full-sky CMB polarization experiments, we study the impact of fitting different spectral parameters of Galactic foregrounds in distinct subsets of pixels on the sky, with the goal of optimizing the search for primordial B modes. Using both simulations and analytical arguments, we highlight how the post-component separation uncertainty and systematic foreground residuals in the cleaned CMB power spectrum dep…

All-optical polarization control in time-varying low-index films via plasma symmetry breaking
Wallace Jaffray, Sven Stengel, Alexandra Boltasseva, Vladimir M. Shalaev, Maria Antonietta Vincenti, Domenico De Ceglia, Michael Scalora, Carlo Rizza, Marcello Ferrera
https://arxiv.org/abs/2510.06985

All-optical polarization control in time-varying low-index films via plasma symmetry breaking
Controlling the polarization state of light with sub-picosecond speed and subwavelength precision remains a key challenge for next-generation nanophotonic devices. Conventional methods such as birefringent crystals, liquid crystals, or electro-optic Pockels cells are limited in speed, compactness, and energy efficiency. While structured materials and two-dimensional heterostructures offer potential for on-chip ultrafast performance, achieving all-optical control remains an open problem. Here we…

Black Hole Polarimetry II: The Connection Between Spin and Polarization
George N. Wong, Andrew Chael, Alexandru Lupsasca, Eliot Quataert
https://arxiv.org/abs/2509.22639 https:/…

Black Hole Polarimetry II: The Connection Between Spin and Polarization
We study synchrotron polarization in spatially resolved horizon-scale images, such as those produced by the Event Horizon Telescope (EHT). In both general relativistic magnetohydrodynamic (GRMHD) simulations as well as simplified models of the black hole magnetosphere, the polarization angle, quantified by the complex observable arg(beta_2), depends strongly and systematically on the black hole spin. This relationship arises from the coupling between spin and the structure of the magnetic field…

Longitudinal transport spin polarization of spin degenerate antiferromagnets
Meng Zhu, Jianting Dong, Xinlu Li, Jiahao Shentu, Yizhuo Song, Evgeny Y. Tsymbal, Jia Zhang
https://arxiv.org/abs/2510.04184

Longitudinal transport spin polarization of spin degenerate antiferromagnets
A vital goal in spintronics is the efficient electrical generation of spin currents, a pursuit that has recently focused on using antiferromagnets (AFMs) as spin current sources. It has been demonstrated that antiferromagnets with broken PT symmetry (parity + time reversal) can efficiently generate longitudinal and transverse spin currents. At the same time, it has been generally thought that antiferromagnets with PT symmetry (PT-AFMs) forbid the longitudinal spin polarization due to their spin…

Monitoring of 3C 286 with ALMA, IRAM, and SMA from 2006 to 2025: Stability, Synchrotron Ages, and Frequency-Dependent Polarization Attributed to Core-Shift
Minchul Kam, Hiroshi Nagai, Motoki Kino, Keiichi Asada, R\"udiger Kneissl, Iv\'an Agudo, Sascha Trippe, Seiji Kameno, Ioannis Myserlis, Ramprasada Rao, Hojin Cho, Richard A. Perley, Bryan J. Butler, Mark Gurwell, Tomoki Matsuoka, Jongho Park, Carolina Casadio, Baltasar Vila Vilaro, Celia Verdugo, Matias Radiszcz, Kurt Plarr…

Monitoring of 3C 286 with ALMA, IRAM, and SMA from 2006 to 2025: Stability, Synchrotron Ages, and Frequency-Dependent Polarization Attributed to Core-Shift
We present the results of multi-frequency monitoring of the radio quasar 3C 286, conducted using three instruments: ALMA at 91.5, 103.5, 233.0, and 343.4 GHz, the IRAM 30-m Telescope at 86 and 229 GHz, and SMA at 225 GHz. The IRAM measurements from 2006 to 2024 show that the total flux of 3C 286 is stable within measurement uncertainties, indicating long-term stability up to 229 GHz, when applying a fixed Kelvin-to-Jansky conversion factor throughout its dataset. ALMA data from 2018 to 2024 exh…

Harnessing optical disorder for Bell inequalities violation
Baptiste Courme, Malo Joly, Adrian Makowski, Sylvain Gigan, Hugo Defienne
https://arxiv.org/abs/2509.21052 https://…

Harnessing optical disorder for Bell inequalities violation
Bell inequalities are a cornerstone of quantum physics. By carefully selecting measurement bases (typically polarization), their violation certifies quantum entanglement. Such measurements are disrupted by the presence of optical disorder in propagation paths, including polarization or spatial mode mixing in fibers and through free-space turbulence. Here, we demonstrate that disorder can instead be exploited as a resource to certify entanglement via a Bell inequality test. In our experiment, on…

Recovering unbiased CMB polarization maps using modern ground-based experiments with minimal assumptions about atmospheric emission
Simon Biquard, Josquin Errard, Radek Stompor
https://arxiv.org/abs/2509.16302

Recovering unbiased CMB polarization maps using modern ground-based experiments with minimal assumptions about atmospheric emission
We present a study of unbiased reconstruction of cosmic microwave background (CMB) polarization maps from data collected by modern ground-based observatories. Atmospheric emission is a major source of correlated noise in such experiments, complicating the recovery of faint cosmological signals. We consider estimators that require minimal assumptions about unpolarized atmospheric emission properties, instead exploiting hardware solutions commonly implemented in modern instruments, such as pairs …

First Results from ALPPS [the Atacama Large Millimeter/submillimeter Array Perseus Polarization Survey] - A Sub-Alfvénic Streamer in SVS 13A: #Star-Building Material into Newborn System in Perseus: https://www.almaobservatory.org/en/press-releases/astronomers-spot-magnetically-guided-streamer-funneling-star-building-material-into-newborn-system-in-perseus/

First Observation of $\Lambda$ Hyperon Transverse Polarization in $\psi(3686)\to\Lambda\bar\Lambda$
BESIII Collaboration, et al.
https://arxiv.org/abs/2509.15276 https://…

First Observation of $Λ$ Hyperon Transverse Polarization in $ψ(3686)\toΛ\barΛ$
Based on $(448.1\pm2.9)\times10^{6}$ $ψ(3686)$ events collected with the BESIII detector at the BEPCII collider, we present the first observation of spin transverse polarization of $Λ$ and $\barΛ$ hyperons produced coherently in the decay $ψ(3686)\toΛ(\to pπ^-)\barΛ(\to\bar pπ^+)$. The relative phase between the electric and magnetic hadronic form factors is measured to be $ΔΦ=(21.0\pm3.7_{\rm stat.}\pm0.8_{\rm syst.})^{\circ}$. The angular distribution parameter $α_ψ=0.83\pm0.02_{\…

Physical Properties of 29 March 2006 Solar Corona
Hikmet \c{C}akmak
https://arxiv.org/abs/2510.08057 https://arxiv.org/pdf/2510.08057

Physical Properties of 29 March 2006 Solar Corona
On 29 March 2006, a total solar eclipse was observed in the Manavgat district of Antalya, Turkey. During the event, the solar corona was observed using an 8-inch mirrored telescope. White-light polarization observations were carried out at three distinct angles using a polarizing filter placed in front of the camera system. To calibrate the intensity of the roll film, photographs of the eclipse and the solar disk were taken with a traditional 35mm manual camera. Using the solar disk images obta…

Electric susceptibility of antiferromagnetic multiferroics with cycloidal spin order at magnetoelectric effect associated with collinear component of spins
Pavel A. Andreev
https://arxiv.org/abs/2510.07425

Electric susceptibility of antiferromagnetic multiferroics with cycloidal spin order at magnetoelectric effect associated with collinear component of spins
The contribution of magnetoelectric effect to Landau--Lifshitz-Gilbert equation is considered in case when medium polarization is caused by parallel component of neighboring spins. The result is presented for ferromagnetic and antiferromagnetic materials. A comparison is given with the contribution of magnetoelectric effect to Landau--Lifshitz-Gilbert equation when medium polarization is caused by perpendicular component of spins. The dispersion dependence of spin waves in antiferromagnets with…

Valley polarization of graphene via the saddle point
Deepika Gill, Sangeeta Sharma, Peter Elliott, Kay Dewhurst, Sam Shallcross
https://arxiv.org/abs/2510.08066 https://

Valley polarization of graphene via the saddle point
Graphene, and other members of the monolayer Xene family, represent an ideal materials platform for "valleytronics", the control of valley localized charge excitations. The absence of a gap in these semi-metals, however, precludes valley excitation by circularly polarized light pulses, sharply circumscribing the possibility of a lightwave valleytronics in these materials. Here we show that combining a deep ultraviolet linearly polarized light pulse with a THz envelope can induce highly valley p…

Clues on the X-ray emission mechanism of blazars PKS 2155$-$304 and 3C 454.3 through polarization studies
Athira M Bharathan, C S Stalin, Sunder Sahayanathan, Blesson Mathew
https://arxiv.org/abs/2509.16976

Clues on the X-ray emission mechanism of blazars PKS 2155$-$304 and 3C 454.3 through polarization studies
X-ray polarization measurable with the imaging X-ray Polarimetry Explorer (\textit{IXPE}) could constrain the long-debated leptonic versus hadronic origin of the high-energy component in the broadband spectral energy distribution (SED) of blazars. We report \textit{IXPE} results and SED modeling of PKS 2155$-$304 and 3C 454.3, a high- and low-synchrotron-peaked blazar. For PKS 2155$-$304, model-independent analysis gives polarization angle $Ψ_X$ = (130$\pm$2.5) deg and polarization degree $Π_…

The influence of invisible light particles on $\Lambda_b \to \Lambda E_{\mathrm{miss}}$
Quan-Yi Hu, Zhi-Bin Duan
https://arxiv.org/abs/2510.05272 https://a…

The influence of invisible light particles on $Λ_b \to ΛE_{\mathrm{miss}}$
In this work, we study the contribution of invisible light particles to $Λ_b \to ΛE_{\mathrm{miss}}$, particularly the three-body decays $Λ_b \to Λϕ\barϕ$ and $Λ_b \to Λψ\barψ$. The differential branching ratio of $Λ_b \to ΛE_{\mathrm{miss}}$ and the $q^2$-dependent longitudinal polarization asymmetry of $Λ$ in scenarios explaining the Belle II excess are presented. In the chiral basis, we investigate the correlations between $\mathcal{B}(B \to K E_{\mathrm{miss}})$ and $\mathcal{B…

Polarization Maintaining Large Mode Area Yb Fibers for All Fiber Nanosecond Pulse Amplification
Erin S. Lamb, Yaakov Glick, Jose Pincha, Ishu Goel, Robert S. Windeler, Simona Ovtar, Vasiliy Lukonin, Ian Sun, Shantanu Pandit, Jeffrey W. Nicholson
https://arxiv.org/abs/2510.03213

Polarization Maintaining Large Mode Area Yb Fibers for All Fiber Nanosecond Pulse Amplification
Polarization maintaining (PM), all-fiber amplifiers offer the benefits of alignment free and environmentally stable operation. To achieve high output powers, particularly in pulsed operation, it is necessary to balance the need to reduce deleterious nonlinear effects, often through the use of large mode area (LMA) fibers, with the onset of transverse mode instability whereby higher order modes (HOMs) mix with the desired fundamental mode output. Over the last few years, advances in high HOM los…

First Detection of X-ray Polarization and Its Short-term Increase Pre- and Post-Eclipse in HMXB 4U 1700-377
Kaito Ninoyu, Keisuke Uchiyama, Shinya Yamada, Ryota Hayakawa, Shunji Kitamoto, Nao Kominato, Takayoshi Kohmura, Misaki Mizumoto, Yuusuke Uchida, Toru Tamagawa, Ryota Tomaru, Seoru Ito
https://arxiv.org/abs/2509.14494

First Detection of X-ray Polarization and Its Short-term Increase Pre- and Post-Eclipse in HMXB 4U 1700-377
We report the first statistically significant detection of X-ray polarization from the high-mass X-ray binary (HMXB) 4U 1700-377, observed using the Imaging X-ray Polarimetry Explorer (IXPE). A polarization degree exceeding 10% was detected above 5 keV, placing it among the highest polarization observed in HMXBs to date. The observation was conducted over a full orbital period of the binary system, during which several sporadic and instantaneous flares were detected. We identify a clear correla…

Hybrid MBE Route to Adsorption-Controlled Growth of BaTiO3 Membranes with Robust Polarization Switching
S. Choo, S. Varshney, J. Shah, A. K. Manjeshwar, D. K. Lee, K. A. Mkhoyan, R. D. James, B. Jalan
https://arxiv.org/abs/2510.03834

Hybrid MBE Route to Adsorption-Controlled Growth of BaTiO3 Membranes with Robust Polarization Switching
Freestanding ferroelectric membranes are promising for flexible electronics, nonvolatile memory, photonics, and spintronics, but their synthesis is challenged by the need for reproducibility with precise stoichiometric control. Here, we demonstrate the adsorption-controlled growth of single-crystalline, epitaxial BaTiO3 films by hybrid molecular beam epitaxy (MBE) on a binary oxide sacrificial layer. Using a simple water-droplet lift-off method, we obtained submillimeter- to millimeter-sized me…

Analytical modeling of polarization signals arising from confined circumstellar material in Type II supernovae
T. Nagao, K. Maeda, T. Matsumoto
https://arxiv.org/abs/2509.19874 …

Analytical modeling of polarization signals arising from confined circumstellar material in Type II supernovae
Recent observations of Type II supernovae (SNe) have brought a challenge in our understanding on the final evolutionary stage of massive stars. The early-time spectra and light curves of Type II SNe suggest that a majority of them have dense circumstellar material (CSM) in their vicinity, the so-called confined CSM. However, the mechanism of these extensive mass loss has not yet been understood. For addressing this problem, we aim to study the spatial distribution of the confined CSM, which has…

Revisit of the electromagnetic correction to $\tau\to\pi\pi\nu_\tau$ and its implication for muon $g-2$ based on $\tau$ data
Zhi-Xin Li, Ao Li, Jin Hao, Chun-Gui Duan, Zhi-Hui Guo
https://arxiv.org/abs/2510.04172

Revisit of the electromagnetic correction to $τ\toππν_τ$ and its implication for muon $g-2$ based on $τ$ data
In this work we focus on the evaluation of the leading-order hadronic vacuum polarization contribution from the $ππ$ channel to the muon anomalous magnetic moment $a_μ$ by using the experimental $τ\toππν_τ$ data. The isospin breaking corrections play the decisive role in this approach of computing $a_μ$. One of such important isospin breaking sources is the long-distance electromagnetic correction factor $G_{\rm EM}$ of the $τ\toππν_τ$ process from the real photon radiation. The l…

Polarization Domain Mapping From 4D-STEM Using Deep Learning
Fintan G. Hardy, Sinead M. Griffin, Mariana Palos, Yaqi Li, Geri Topore, Aron Walsh, Michele Shelly Conroy
https://arxiv.org/abs/2510.00693 …

Polarization Domain Mapping From 4D-STEM Using Deep Learning
Polarization in ferroelectric domains arises from atomic-scale structural variations that govern macroscopic functionalities. The interfaces between these domains known as domain walls host distinct physical responses, making their identification and control critical. Four dimensional scanning transmission electron microscopy (4DSTEM) enables simultaneous acquisition of real and reciprocal-space information at the atomic scale, offering a powerful platform for domain mapping. However, conventio…

BIFROST: A First-Principles Model of Polarization Mode Dispersion in Optical Fiber
Patrick R. Banner, Steven L. Rolston, Joseph W. Britton
https://arxiv.org/abs/2510.01212 https…

BIFROST: A First-Principles Model of Polarization Mode Dispersion in Optical Fiber
We present BIFROST, a first-principles model of polarization mode dispersion (PMD) in optical fibers. Unlike conventional models, BIFROST employs physically motivated representations of the PMD properties of fibers, allowing users to computationally investigate real-world fibers in ways that are connected to physical parameters such as environmental temperature and external stresses. Our model, implemented in an open-source Python module, incorporates birefringence from core geometry, material …

Theory overview on polarization and spin-correlations in multi-boson processes
Thi Nhung Dao, Duc Ninh Le
https://arxiv.org/abs/2509.20232 https://arxiv.or…

Theory overview on polarization and spin-correlations in multi-boson processes
In this contribution, we summarize and discuss recent theoretical progress on the Standard-Model calculation of joint polarized cross sections of massive multi-boson processes with fully leptonic decays. The topics include fixed-order calculation of higher order QCD and electroweak corrections for both production and decay amplitudes, and parton-shower effects.

Mapping complex optical light field distributions with single fluorescent molecules
Daniel Marx, Ivan Gligonov, David Malsbenden, Dominik W\"oll, Oleksii Nevskyi, J\"org Enderlein
https://arxiv.org/abs/2510.05791

Mapping complex optical light field distributions with single fluorescent molecules
Single fluorescent molecules, behaving as ideal electric dipole emitters, are powerful nanoscopic probes of complex optical fields. Here, this property is exploited to precisely map the polarization and vectorial structure of tightly focused laser beams, utilizing both linear and circular polarization states. The resulting three-dimensional fluorescence excitation maps strikingly reveal the intrinsic chiral and non-chiral structure of the light field, in perfect quantitative agreement with a fu…

First X-ray and radio polarimetry of the neutron star low-mass X-ray binary GX 17 2
Unnati Kashyap, Thomas J. Maccarone, Eliot C. Pattie, Mason Ng, Swati Ravi, Alexandra J. Tetarenko, Pau Bosch Cabot, Herman L. Marshall
https://arxiv.org/abs/2510.05284

First X-ray and radio polarimetry of the neutron star low-mass X-ray binary GX 17+2
We report the first polarimetric results of the neutron star (NS) low-mass X-ray binary (LMXB) Z-source GX 17+2 using the Imaging X-ray Polarimetry Explorer (IXPE) and the Very Large Array (VLA). We find that the X-ray source was polarized at PD = 1.9 +/- 0.3 % (1-sigma errors) with a polarization angle of PA = 11 +/- 4 degree (1-sigma errors). Simultaneous Nuclear Spectroscopic Telescope Array (NuSTAR) observations show that the source was in the normal branch (NB) during our IXPE observations…

Antiferromagnetic domain walls under spin-orbit torque
George Theodorou, Stavros Komineas
https://arxiv.org/abs/2509.22241 https://arxiv.org/pdf/2509.22241…

Antiferromagnetic domain walls under spin-orbit torque
Domain walls in antiferromagnets under a spin-polarized current present rich dynamics that is not observed in ferromagnets, and it is tunable by the current polarization. Precessional dynamics is obtained for perpendicular spin polarization, in agreement with expectations in older works. Propagating walls are obtained for an in-plane polarization. We obtain the velocity as a function of current by a perturbation method for low velocities, and the wall profile is found to lack a definite parity.…

Polarization-Sensitive Au-TiO2 Nanopillars for Tailored Photocatalytic Activity
Ning Lyu, Anjalie Edirisooriya, Zelio Fusco, Dawei Liu, Lan Fu, Fiona J. Beck, Christin David
https://arxiv.org/abs/2509.21911

Polarization-Sensitive Au-TiO2 Nanopillars for Tailored Photocatalytic Activity
Plasmonic metasurfaces play a crucial role in resonance-driven photocatalytic reactions by effectively enhancing reactivity via localized surface plasmon resonances. Catalytic activity can be selectively modulated by tuning the strength of plasmonic resonances through two primary non-thermal mechanisms: near-field enhancement and hot carrier injection, which govern the population of energetic carrier excited or injected into unoccupied molecular orbitals. We developed a set of polarization-sens…

Observation of electromagnons in a monolayer multiferroic
Mohammad Amini, Tiago V. C. Ant\~ao, Liwei Jing, Ziying Wang, Antti Karjasilta, Robert Drost, Shawulienu Kezilebieke, Jose L. Lado, Adolfo O. Fumega, Peter Liljeroth
https://arxiv.org/abs/2510.08253

Observation of electromagnons in a monolayer multiferroic
Van der Waals multiferroics have emerged as a promising platform to explore novel magnetoelectric phenomena. Recently, it has been shown that monolayer NiI$_2$ hosts robust type-II multiferroicity down to the two-dimensional limit, a giant dynamical magnetoelectric coupling at terahertz frequencies, and an electrically switchable spin polarization. These developments present the possibility of engineering ultrafast, low-energy-consumption, and electrically-tunable spintronic devices based on th…

Electro-optic effects in some sliding ferroelectrics
Xueqing Wan, Zhenlong Zhang, Charles Paillard, Jinyang Ni, Lei Zhang, Zhijun Jiang, Laurent Bellaiche
https://arxiv.org/abs/2510.03738

Electro-optic effects in some sliding ferroelectrics
Sliding ferroelectrics, which exhibit out-of-plane polarization arising from specific stacking rather than conventional ionic displacements, are new types of ferroelectrics whose underdeveloped physics needs to be explored. Here, we investigate for the first time the electro-optic (EO) response of these materials using first-principles calculations, focusing on ZrI$_{2}$ as a prototype. We reveal that, contrary to conventional ferroelectrics, the EO effect in ZrI$_{2}$ is dominated by its elect…

Can a vector beam be critically coupled leading to perfect absorption?
Sauvik Roy, Nirmalya Ghosh, Ayan Banerjee, Subhasish Dutta Gupta
https://arxiv.org/abs/2510.06822 https://…

Can a vector beam be critically coupled leading to perfect absorption?
Critical coupling has emerged as a prominent area of research in recent years. However, most theoretical models are based on scalar theories (and occasionally coupled mode theories), which inadequately account for the polarization states of the incident light. To bridge this gap, we revisit the concept of critical coupling in planar multilayer structures using a full vectorial theory, where conventional plane wave illumination is replaced by well-defined vector beams with and without orbital an…

Multimodal Speckle-polarization Fiber-optic Sensing for Localized and High-bandwidth Vibration Monitoring
Catarina S. Monteiro, Tom\'as Lopes, Joana Teixeira, Tiago Ferreira, Pedro A. S. Jorge, Nuno A. Silva
https://arxiv.org/abs/2509.22079

Multimodal Speckle-polarization Fiber-optic Sensing for Localized and High-bandwidth Vibration Monitoring
High-bandwidth and multi-point acoustic and vibration sensing is a critical asset for real-time condition monitoring, maintenance, and surveillance applications. In the case of large scales and harsh environments, optical fiber distributed sensing has emerged as a compelling alternative to electronic transducers, featuring lower installation and maintenance costs, along with compact footprints and enhanced robustness. Yet, current distributed fiber-optic sensing solutions are typically costly a…