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Quantum Effective Dynamics of Papapetrou Spacetime
Xiaokan Guo, Faqiang Yuan
https://arxiv.org/abs/2506.08821 https://arxiv.org/pdf/2…

Quantum Effective Dynamics of Papapetrou Spacetime
In this paper, we investigate the quantum effective dynamics of Papapetrou spacetime by using methods from loop quantum gravity. The Papapetrou spacetime is an extension of the Schwarzschild spacetime with an extra coupled anti-scalar field. By solving the equations of motion generated by the Hamiltonian constraint for Papapetrou spacetime, we can construct the quantum effective metric. The resulting effective metric for the quantum-corrected Papapetrou spacetime demonstrates the quantum effect…

Squeezing effect on three-dimensional Hanbury Brown-Twiss radii
Yong Zhang, Peng Ru
https://arxiv.org/abs/2506.07178 https://arxiv.or…

Squeezing effect on three-dimensional Hanbury Brown-Twiss radii
This paper examines the impacts of the squeezing effect caused by the particle's in-medium mass modification on the three-dimensional Hanbury Brown-Twiss (HBT) radii. An analysis is conducted on how the squeezing effect impacts the three-dimensional HBT radii of $ϕϕ$, $D^0$$D^0$, and $K^+$$K^+$. The squeezing effect suppresses the impacts of transverse flow on the transverse source distribution and broadens the space-time rapidity distribution of the particle-emitting source, leading to an in…

Graph-theoretic Inference for Random Effects in High-dimensional Studies
Lynna Chu, Yichuan Bai
https://arxiv.org/abs/2506.07946 https://

Graph-theoretic Inference for Random Effects in High-dimensional Studies
We study the problem of testing for the presence of random effects in mixed models with high-dimensional fixed effects. To this end, we propose a rank-based graph-theoretic approach to test whether a collection of random effects is zero. Our approach is non-parametric and model-free in the sense that we not require correct specification of the mixed model nor estimation of unknown parameters. Instead, the test statistic evaluates whether incorporating group-level correlation meaningfully improv…

Edge burst effect and scale-free localization
G. Sen, C. Yuce
https://arxiv.org/abs/2506.08559 https://arxiv.org/pdf/2506.08559

Edge burst effect and scale-free localization
The non-Hermitian edge burst is a phenomenon observed in non-Hermitian quantum dynamics, characterized by a significant accumulation of loss at the boundaries of a system. We present an example of the edge burst effect in a lossy lattice with bipolar non-Hermitian skin effect (NHSE). By introducing a weak coupling between two such non-Hermitian lattices, we demonstrate that the system exhibits bipolar scale-free localization. Through an analysis of local decay distributions and their sensitivit…

Roles of Non-switchable Domains and Internal Bias in Electrocaloric and Pyroelectric effects
Jun Usami, Yuki Okamoto, Hisashi Inoue, Takeshi Kobayashi, Hiroyuki Yamada
https://arxiv.org/abs/2506.07573

Roles of Non-switchable Domains and Internal Bias in Electrocaloric and Pyroelectric effects
Solid-state cooling and energy harvesting via pyroelectric effect (PEE) and electrocaloric effect (ECE) in ferroelectric thin films could be enhanced beyond their intrinsic ferroelectric response by exploiting the recently observed direction-dependent enhancement of the PEE; however, its microscopic origin remains unknown. Herein, we report direct hysteresis measurements of pyrocurrent ($I_{\rm p}$) and ECE-induced temperature change versus bias voltage in 1-$μ$m-thick Pb(Zr$_{0.65}$Ti$_{0.35}…

This https://arxiv.org/abs/2501.03341 has been replaced.
initial toot: https://mastoxiv.page/@…

Dynamic scaling theory for a field quench near the Kasteleyn transition in spin ice
We present a dynamic scaling theory to describe relaxation dynamics following a magnetic-field quench near an unconventional phase transition in the magnetic material spin ice. Starting from a microscopic model, we derive an effective description for the critical dynamics in terms of the seeding and growth of string excitations, and use this to find scaling forms in terms of time, reduced temperature and monopole fugacity. We confirm the predictions of scaling theory using Monte Carlo simulatio…

Operator theoretic measure of causality in linear dynamical systems
Ankit Srivastava, Louis Cattafesta, Scott Dawson
https://arxiv.org/abs/2506.08118 https…

Operator theoretic measure of causality in linear dynamical systems
This paper introduces Linear Operator Causality Analysis (LOCA), a physics-based framework for analyzing causality in linear dynamical systems, with a focus on fluid mechanics. Unlike data-driven statistical methods like Granger causality, LOCA uses the matrix exponential from the system's governing equations to provide a more rigorous and interpretable measure of causal interactions. Our framework reveals that, under certain conditions, common data-driven measures effectively approximate the s…

A structural nested rate model for estimating the effects of time-varying exposure on recurrent event outcomes in the presence of death
Daniel Mork, Robert L. Strawderman, Michelle Audirac, Francesca Dominici, Ashkan Ertefaie
https://arxiv.org/abs/2506.07910

A structural nested rate model for estimating the effects of time-varying exposure on recurrent event outcomes in the presence of death
Assessing the causal effect of time-varying exposures on recurrent event processes is challenging in the presence of a terminating event. Our objective is to estimate both the short-term and delayed marginal causal effects of exposures on recurrent events while addressing the bias of a potentially correlated terminal event. Existing estimators based on marginal structural models and proportional rate models are unsuitable for estimating delayed marginal causal effects for many reasons, and furt…

All-optical control of antiferromagnetic domains via an inverse optical magnetoelectric effect
Shingo Toyoda, Vilmos Kocsis, Yusuke Tokunaga, Istv\'an K\'ezsm\'arki, Yasujiro Taguchi, Taka-hisa Arima, Yoshinori Tokura, Naoki Ogawa
https://arxiv.org/abs/2506.07051

All-optical control of antiferromagnetic domains via an inverse optical magnetoelectric effect
Antiferromagnets are a promising platform for next-generation spintronics due to their ultrafast spin dynamics and robustness to external fields. All-optical control of antiferromagnetic order is essential to fully exploit their potential in energy-efficient and high-speed spintronic and memory applications. However, optical writing of antiferromagnetic domains remains a fundamental challenge, as conventional magneto-optical techniques rely on net magnetization, which is absent in antiferromagn…

Orbital Hall Effect Enables Field-Free Magnetization Reversal in Ferrimagnets without Additional Conversion Layer
Zelalem Abebe Bekele, Kun Lei, Xiukai Lan, Xiangyu Liu, Hui Wen, Weihao Li, Yongcheng Deng, Wenkai Zhu, Kaiming Cai, Kaiyou Wang
https://arxiv.org/abs/2506.07608

Orbital Hall Effect Enables Field-Free Magnetization Reversal in Ferrimagnets without Additional Conversion Layer
The spin Hall effect (SHE) enables efficient electrical manipulation of magnetization through the spin Hall current \left(\mathbit{J}_{\mathbit{SHE}}\right), advancing energy-efficient spintronics. In parallel, the orbital Hall effect (OHE) offers an alternative pathway to SHE for converting charge current into an angular momentum flow. In this study, we demonstrate field-free current-induced perpendicular ferrimagnetic deterministic switching within a Mo/CoGd device without an additional orbit…