Physical Review E最新文献_第6页

Stochastic thermodynamics of Brownian motion in a flowing fluid. 流动液体中布朗运动的随机热力学。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-10-01 DOI: 10.1103/PhysRevE.110.044108

Jun Wu, Mingnan Ding, Xiangjun Xing

引用次数: 0

Power dissipation and entropy production rate of high-dimensional optical matter systems. 高维光学物质系统的功率耗散和熵产生率。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-10-01 DOI: 10.1103/PhysRevE.110.044109

Shiqi Chen, Emmanuel Valenton, Grant M Rotskoff, Andrew L Ferguson, Stuart A Rice, Norbert F Scherer

{"title":"Power dissipation and entropy production rate of high-dimensional optical matter systems.","authors":"Shiqi Chen, Emmanuel Valenton, Grant M Rotskoff, Andrew L Ferguson, Stuart A Rice, Norbert F Scherer","doi":"10.1103/PhysRevE.110.044109","DOIUrl":"https://doi.org/10.1103/PhysRevE.110.044109","url":null,"abstract":"Entropy production is an essential aspect of creating and maintaining nonequilibrium systems. Despite their ubiquity, calculation of entropy production rates is challenging for high-dimensional systems, so it has only been reported for simple (i.e., l-particle) systems. Moreover, there is a dearth of nontrivial experimental systems where precise measurements of entropy production rate and characterization of the nonequilibrium steady state (NESS) are simultaneously possible. We report an approach to calculate the entropy production rate of overdamped, nonconservative, N-body systems and demonstrate this on a six-particle triangle optical matter (OM) system as a nontrivial example. OM systems consist of (nano-)particles organized into ordered arrays that are bound by electrodynamic interactions associated with the scattering and interference of light, and the associated induced-polarizations in and among the particles in coherent optical beams. The flux of laser light in OM systems in a solution environment necessitates that they dissipate energy, produce entropy, and relax to a NESS. The NESS may have several ordered particle configurations (i.e., isomers) that can interchange by barrier crossing processes. Understanding the power dissipation and entropy production rate of a NESS in an OM system along different (collective) modes of motion can advance understanding of the relative stability of the NESSs as well as inform design and control of OM structures. Therefore, we compute the components of the entropy production rate and power dissipation along the collective coordinates of the 6 Ag nanoparticle triangle OM system from OM NESS trajectory data and verify the Seifert relation [U. Seifert, Rep. Prog. Phys. 75, 126001 (2012)10.1088/0034-4885/75/12/126001] for these complex systems with a nuanced interpretation.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":"110 4-1","pages":"044109"},"PeriodicalIF":2.2,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142677598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sensitivity analysis of colored-noise-driven interacting particle systems. 彩色噪声驱动的相互作用粒子系统的灵敏度分析。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-10-01 DOI: 10.1103/PhysRevE.110.044119

Josselin Garnier, Harry L F Ip, Laurent Mertz

引用次数: 0

Shearless effective barriers to chaotic transport induced by even twin islands in nontwist systems. 非扭曲系统中偶数孪生岛屿诱发的无剪切力有效混乱传输障碍。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-10-01 DOI: 10.1103/PhysRevE.110.044201

M Mugnaine, I L Caldas, J D Szezech, R L Viana, P J Morrison

{"title":"Shearless effective barriers to chaotic transport induced by even twin islands in nontwist systems.","authors":"M Mugnaine, I L Caldas, J D Szezech, R L Viana, P J Morrison","doi":"10.1103/PhysRevE.110.044201","DOIUrl":"https://doi.org/10.1103/PhysRevE.110.044201","url":null,"abstract":"For several decades now it has been known that systems with shearless invariant tori, nontwist Hamiltonian systems, possess barriers to chaotic transport. These barriers are resilient to breakage under perturbation and therefore regions where they occur are natural places to look for barriers to transport. Here we describe a kind of effective barrier that persists after the shearless torus is broken. Because phenomena are generic, for convenience we study the standard nontwist map (SNM), an area-preserving map that violates the twist condition locally in the phase space. The barrier occurs in nontwist systems when twin even period islands are present, which happens for a broad range of parameter values in the SNM. With a phase space composed of regular and irregular orbits, the movement of chaotic trajectories is hampered by the existence of shearless curves, total barriers, and a network of partial barriers formed by the stable and unstable manifolds of the hyperbolic points. Being a degenerate system, the SNM has twin islands and, consequently, twin hyperbolic points. We show that the structures formed by the manifolds intrinsically depend on period parity of the twin islands. For this even scenario the structure that we call a torus free barrier occurs because the manifolds of different hyperbolic points form an intricate chain atop a dipole configuration and the transport of chaotic trajectories through the chain becomes a rare event. This structure impacts the emergence of transport, the escape basin for chaotic trajectories, the transport mechanism, and the chaotic saddle. The case of odd periodic orbits is different: we find for this case the emergence of transport immediately after the breakup of the last invariant curve, and this leads to a scenario of higher transport, with intricate escape basin boundary and a chaotic saddle with nonuniformly distributed points.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":"110 4-1","pages":"044201"},"PeriodicalIF":2.2,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142677608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Threshold crossing time theory for quasicycles with application to brain rhythms. 应用于大脑节律的类周期阈值跨越时间理论。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-10-01 DOI: 10.1103/PhysRevE.110.044313

Mathias Roman, Ivan L'Heureux, Arthur Powanwe, André Longtin

{"title":"Threshold crossing time theory for quasicycles with application to brain rhythms.","authors":"Mathias Roman, Ivan L'Heureux, Arthur Powanwe, André Longtin","doi":"10.1103/PhysRevE.110.044313","DOIUrl":"https://doi.org/10.1103/PhysRevE.110.044313","url":null,"abstract":"The amplitude of a two-dimensional Ornstein-Uhlenbeck colored noise process evolves according to the one-dimensional Rayleigh process. This is a general model for the random amplitude fluctuations of a quasicycle, i.e., of a noise-induced oscillation around an equilibrium with complex eigenvalues in physical and biological systems. We consider the probability density of time intervals during which the amplitude is either below or above a fixed threshold. The statistics of such first return times (FRTs) are of particular interest in neuroscience to characterize brain rhythm power excursions known as bursts, as well as avalanches and other branching processes. In contrast with the density of first passage times computed using Fokker-Planck theory between a start point and a different endpoint, the density of FRTs is non-normalizable. A recently proposed technique reframes the problem using an expansion of the Fokker-Planck eigenfunctions along with a correction to the normalization. Analytical expressions for the FRT density for the Rayleigh process are shown to be in good agreement with those computed from numerical realizations over a wide range of parameters, both for trajectories above and below threshold. Special care is required to evaluate the theory above threshold due to the crowded roots of the Tricomi confluent hypergeometric function. The results provide insight into the statistics of threshold crossing times in quasicycles generally, and in the stochastic Wilson-Cowan neural equations in particular. Surprisingly, FRTs are governed by a single meta-parameter Δ given by the ratio of the noise strength and the linear stability coefficient. We find the universal property that the mean FRT is invariant to the ratio of threshold to sqrt[Δ]. The FRT density further exhibits exponential behavior over medium to long timescales, and mixtures of exponentials at shorter FRTs, thereby establishing the absence of strict power-law scaling in these threshold-crossing statistics.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":"110 4-1","pages":"044313"},"PeriodicalIF":2.2,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142677618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Charged aggregation. 充电聚合。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-10-01 DOI: 10.1103/PhysRevE.110.044128

P L Krapivsky, S Redner

引用次数: 0

Countering adversarial perturbations in graphs using error correcting codes. 利用纠错码对抗图中的对抗性扰动

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-10-01 DOI: 10.1103/PhysRevE.110.044304

Saif Eddin Jabari

引用次数: 0

Comparison of the microcanonical population annealing algorithm with the Wang-Landau algorithm. 微规范群体退火算法与 Wang-Landau 算法的比较。