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We consider the phenomenon of weak localization of a short wave pulse in a quasi-1D disordered waveguide. We show that the long-time decay of the average transmission coefficient is not purely exponential, in contradiction with predictions…

无序系统与神经网络 · 物理学 2007-05-23 S. E. Skipetrov , B. A. van Tiggelen

We study the long-time asymptotic behavior of the position distribution of a run-and-tumble particle (RTP) in two dimensions and show that the distribution at a time $t$ can be expressed as a perturbative series in $(\gamma t)^{-1}$, where…

统计力学 · 物理学 2023-03-24 Ion Santra , Urna Basu , Sanjib Sabhapandit

We study the the survival probability P(t) upto time t, of a test particle moving in a fluctuating external field. The particle moves according to some prescribed deterministic or stochastic rules and survives as long as the external field…

统计力学 · 物理学 2009-10-30 Satya N. Majumdar , Stephen J. Cornell

Spectral singularities such as exceptional points invoke specific physical effects. The present paper focuses upon the time dependent solutions of the Schr\"odinger equation. In a simple model it is demonstrated that - depending on initial…

量子物理 · 物理学 2015-05-20 WD Heiss

We calculate the survival probability of an immobile target surrounded by a sea of uncorrelated diffusive or subdiffusive evanescent traps, i.e., traps that disappear in the course of their motion. Our calculation is based on a fractional…

统计力学 · 物理学 2015-06-11 E. Abad , S. B. Yuste , Katja Lindenberg

Survival analysis aims to estimate a time-to-event distribution from data with censored observations. Many existing methods either impose structural assumptions on the hazard function or discretize the time axis, which may limit flexibility…

机器学习 · 计算机科学 2026-05-22 Stanislav R. Kirpichenko , Andrei V. Konstantinov , Lev V. Utkin

We present spatio-temporal characteristics of spreading depolarizations (SD) in two experimental systems: retracting SD wave segments observed with intrinsic optical signals in chicken retina, and spontaneously occurring re-entrant SD waves…

The Quantum-Electrodynamical Time-Dependent Density Functional Theory (QED-TDDFT) equations are solved by time propagating the wave function on a tensor product of a Fock-space and real-space grid. Applications for molecules in cavities…

量子物理 · 物理学 2022-11-30 Justin Malave , Alexander Ahrens , Daniel Pitagora , Cody Covington , Kálmán Varga

We consider a one-dimensional run-and-tumble particle, or persistent random walk, in the presence of an absorbing boundary located at the origin. After each tumbling event, which occurs at a constant rate $\gamma$, the (new) velocity of the…

统计力学 · 物理学 2021-05-31 Benjamin De Bruyne , Satya N. Majumdar , Gregory Schehr

We report the results of analytic and numerical investigations of the time scale of survival or non-zero-crossing probability $S(t)$ in equilibrium step fluctuations described by Langevin equations appropriate for attachment/detachment and…

统计力学 · 物理学 2007-05-23 C. Dasgupta , M. Constantin , S. Das Sarma , Satya N. Majumdar

We calculate the survival probability of a stationary target in one dimension surrounded by diffusive or subdiffusive traps of time-dependent density. The survival probability of a target in the presence of traps of constant density is…

软凝聚态物质 · 物理学 2007-05-23 S. B. Yuste , J. J. Ruiz-Lorenzo , Katja Lindenberg

An effect generated by the nonexponential behavior of the survival amplitude of an unstable state in the long time region is considered. We find that the instantaneous energy of the unstable state for a large class of models of unstable…

高能物理 - 唯象学 · 物理学 2010-07-13 K. Urbanowski

We present a design for an optical dielectric bowtie cavity which features deep sub-wavelength confinement of light. The cavity is derived via simplification of a complex geometry identified through inverse design by topology optimization,…

We consider a non-Gaussian stochastic process where a particle diffuses in the $y$-direction, $dy/dt=\eta(t)$, subject to a transverse shear flow in the $x$-direction, $dx/dt=f(y)$. Absorption with probability $p$ occurs at each crossing of…

统计力学 · 物理学 2009-11-11 Alan J. Bray , Satya N. Majumdar

We study the local persistence probability during non-stationary time evolutions in disordered contact processes with long-range interactions by a combination of the strong-disorder renormalization group (SDRG) method, a phenomenological…

统计力学 · 物理学 2020-08-19 Róbert Juhász

We investigate the survival probability of unstable states, the time-dependence of an initial state, in coupled channels. First, we extend the formulation of the survival probability from single channel to coupled channels (two channels).…

高能物理 - 唯象学 · 物理学 2023-06-01 Wren A. Yamada , Osamu Morimatsu , Toru Sato , Koichi Yazaki

We argue that superconductivity in the coexistence region with spin-density-wave (SDW) order in weakly doped Fe-pnictides differs qualitatively from the ordinary $s^{+-}$ state outside the coexistence region, as it develops an additional…

超导电性 · 物理学 2015-07-15 Alberto Hinojosa , Rafael M. Fernandes , Andrey V. Chubukov

We consider the long-time behavior of an explicit tamed exponential Euler scheme applied to a class of parabolic semilinear stochastic partial differential equations driven by additive noise, under a one-sided Lipschitz continuity…

数值分析 · 数学 2020-10-02 Charles-Edouard Bréhier

A transverse deflecting structure (TDS) is a well-known device for characterizing the longitudinal properties of an electron bunch in a linear accelerator. The standard use of such a cavity involves streaking the bunch along a transverse…

加速器物理 · 物理学 2018-12-26 Daniel Marx , Ralph Assmann , Paolo Craievich , Ulrich Dorda , Alexej Grudiev , Barbara Marchetti

Using a TE/TM decomposition for an angular plane-wave spectrum of free random electromagnetic waves and matched boundary conditions, we derive the probability density function for the energy density of the vector electric field in the…

光学 · 物理学 2015-06-26 L. R. Arnaut