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Effective dynamics of a particle diffusing in time-dependent confinement. 时变约束中粒子扩散的有效动力学。
IF 2.4 3区 物理与天体物理
Physical review. E Pub Date : 2025-01-01 DOI: 10.1103/PhysRevE.111.014117
Pavol Kalinay
{"title":"Effective dynamics of a particle diffusing in time-dependent confinement.","authors":"Pavol Kalinay","doi":"10.1103/PhysRevE.111.014117","DOIUrl":"https://doi.org/10.1103/PhysRevE.111.014117","url":null,"abstract":"<p><p>A pointlike particle diffusing in a two-dimensional channel is considered. Its width h(x,t) varies not only with the longitudinal coordinate x, but also in time t. Reducing the transverse degree of freedom in the corresponding diffusion equation, we arrive at the effective one-dimensional dynamics along the channel, represented by the generalized Fick-Jacobs equation; its coefficients calculated recursively also depend on time. In contrast to the static confinement, the moving boundaries generate an effective force driving the particle in the channel, which can be explicitly expressed within our method. We analyze this force in two examples: deformation of the boundary advancing as the traveling wave and in the channel \"breathing\" with an amplitude varying in x.</p>","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"111 1-1","pages":"014117"},"PeriodicalIF":2.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143459256","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
Random search for a partially reactive target by multiple diffusive searchers. 由多个扩散搜索器对部分反应目标进行随机搜索。
IF 2.4 3区 物理与天体物理
Physical review. E Pub Date : 2025-01-01 DOI: 10.1103/PhysRevE.111.014124
Byeong Guk Go, Juyeon Yi, Yong Woon Kim
{"title":"Random search for a partially reactive target by multiple diffusive searchers.","authors":"Byeong Guk Go, Juyeon Yi, Yong Woon Kim","doi":"10.1103/PhysRevE.111.014124","DOIUrl":"https://doi.org/10.1103/PhysRevE.111.014124","url":null,"abstract":"<p><p>We study the first-passage problem for a partially reactive target by N identical diffusive particles in a finite d-dimensional space, laying a focus on the effects of the partial reactivity when searchers are initially excluded from the target region. By solving the Fokker-Planck equation, we obtain the mean first-passage time that exhibits a power-law dependence on the number of searchers as τ_{N}∼N^{-α}, proving that the exponent α varies with dimensionality, reactivity, and the number of searchers, and specifying conditions in which crossovers between different exponents occur. We confirm the validity of our analytic results by performing Langevin dynamics simulations for various sets of system parameters.</p>","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"111 1-1","pages":"014124"},"PeriodicalIF":2.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143458532","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
Nonequilibrium interfacial diffusivity resolves anomalies in monolayer hydrodynamics. 非平衡界面扩散系数解决了单层流体力学中的异常。
IF 2.4 3区 物理与天体物理
Physical review. E Pub Date : 2025-01-01 DOI: 10.1103/PhysRevE.111.L013501
Tyler J Mucci, Bruce L Liu, Joe A Adam, Amir H Hirsa, Jason Yalim, Juan M Lopez
{"title":"Nonequilibrium interfacial diffusivity resolves anomalies in monolayer hydrodynamics.","authors":"Tyler J Mucci, Bruce L Liu, Joe A Adam, Amir H Hirsa, Jason Yalim, Juan M Lopez","doi":"10.1103/PhysRevE.111.L013501","DOIUrl":"https://doi.org/10.1103/PhysRevE.111.L013501","url":null,"abstract":"<p><p>Hydrodynamics of surfactant monolayers are governed by surface tension, surface shear viscosity, surface dilatational viscosity, and surface diffusivity. While the first two have been studied comprehensively with consistent results, surface dilatational viscosity is plagued with anomalies, including apparent negative values. Here, full-field interfacial velocity measurements together with the Navier-Stokes equations reveal that a source of these anomalies is the use of equilibrium surface diffusivity for systems far from equilibrium. Specifically, surface diffisivity was found to be more than seven orders of magnitude (ten million times) larger in a nonsolenoidal interfacial flow field. Micron-sized phase domains in the monolayer are the likely culprit for the enhanced diffusivity.</p>","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"111 1","pages":"L013501"},"PeriodicalIF":2.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143458895","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
Stochastic thermodynamics of Fisher information. 费雪信息的随机热力学。
IF 2.4 3区 物理与天体物理
Physical review. E Pub Date : 2025-01-01 DOI: 10.1103/PhysRevE.111.014101
Pedro B Melo, Sílvio M Duarte Queirós, Welles A M Morgado
{"title":"Stochastic thermodynamics of Fisher information.","authors":"Pedro B Melo, Sílvio M Duarte Queirós, Welles A M Morgado","doi":"10.1103/PhysRevE.111.014101","DOIUrl":"https://doi.org/10.1103/PhysRevE.111.014101","url":null,"abstract":"<p><p>In this manuscript, we investigate the stochastic thermodynamics of Fisher information (FI), meaning we characterize both the fluctuations of FI, introducing a statistics of that quantity, and thermodynamic quantities. We introduce two initial conditions: an equilibrium initial condition and a minimum entropy initial condition, both under a protocol that drives the system to equilibrium. Its results indicate a dependence of the average FI on both the initial condition and path taken. Furthermore, the results indicate that the chosen parameter directly affects the FI of thermodynamic quantities, such as irreversible work and entropy, along with fluctuations of a stochastic FI. Last, we assess the further role of FI of the distribution of thermal quantities within the context of thermostatistical inequalities.</p>","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"111 1-1","pages":"014101"},"PeriodicalIF":2.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143458959","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
Breathing chimera states in nonlocally coupled type-I excitable phase oscillators. 非局部耦合i型可激相振荡器的呼吸嵌合体态。
IF 2.4 3区 物理与天体物理
Physical review. E Pub Date : 2025-01-01 DOI: 10.1103/PhysRevE.111.014222
Yang Li, Haihong Li, Jinfeng Liang, Xuan Wang, Qionglin Dai, Junzhong Yang
{"title":"Breathing chimera states in nonlocally coupled type-I excitable phase oscillators.","authors":"Yang Li, Haihong Li, Jinfeng Liang, Xuan Wang, Qionglin Dai, Junzhong Yang","doi":"10.1103/PhysRevE.111.014222","DOIUrl":"https://doi.org/10.1103/PhysRevE.111.014222","url":null,"abstract":"<p><p>We explore chimera states in a ring of nonlocally coupled type-I excitable phase oscillators, with each isolated oscillator being restricted to a homogeneous equilibrium state. Our study identifies the presence of breathing chimera states, characterized by their oscillatory dynamics and periodic fluctuations in the global order parameter. Beyond the breathing chimera states with a single coherent cluster, we find the 2n-cluster breathing chimera states, where 2n represents an even number of coherent clusters. These states exhibit the varying phase difference between adjacent clusters and a consistent phase among clusters separated by one intermediate cluster. The number of clusters is found to be modulated by the relative coupling radius. These dynamics for the finite number of oscillators are well confirmed by the Ott-Antonsen ansatz.</p>","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"111 1-1","pages":"014222"},"PeriodicalIF":2.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143458980","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
Theory of stochastic resonance with state-dependent diffusion. 状态依赖扩散的随机共振理论。
IF 2.4 3区 物理与天体物理
Physical review. E Pub Date : 2025-01-01 DOI: 10.1103/PhysRevE.111.014125
Samudro Ghosh, Moupriya Das
{"title":"Theory of stochastic resonance with state-dependent diffusion.","authors":"Samudro Ghosh, Moupriya Das","doi":"10.1103/PhysRevE.111.014125","DOIUrl":"https://doi.org/10.1103/PhysRevE.111.014125","url":null,"abstract":"<p><p>Several interesting and important natural processes are the manifestation of the interplay of nonlinearity and fluctuations. Stochastic resonance is one such mechanism and is crucial to explain many physical, chemical, and biological processes, as well as having huge technological importance. The general setup to describe stochastic resonance considers two states. Recently, it has been unveiled that it is necessary to consider the intrinsic fluctuations related to the two different states of the system are different in interpreting certain fundamental natural processes, such as glacial-interglacial transitions in Earth's ice age. This also has significance in developing advantageous technologies. However, until now, there has been no general theory describing stochastic resonance in terms of the transition rate between the two states and their probability distribution function while considering different noise amplitudes or fluctuation characteristics of these two states. The development of this fundamental theory is attempted in the present research work. As a first step, a relevant approximation is used in which the system is considered within the adiabatic limit. The analytical derivations are corroborated by numerical simulation results. Furthermore, a semianalytical theory is proposed for the definite system without any approximations as the exact analytical solution is not achievable. This semianalytical theory is found to replicate the results obtained from the Brownian dynamics simulation study for previously known quantifiers for stochastic resonance which are estimated in the present context for the system with state-dependent diffusion.</p>","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"111 1-1","pages":"014125"},"PeriodicalIF":2.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143459042","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
Classical-driving-assisted qubit-array quantum battery. 经典驱动辅助量子比特阵列量子电池。
IF 2.4 3区 物理与天体物理
Physical review. E Pub Date : 2025-01-01 DOI: 10.1103/PhysRevE.111.014121
Zai-Kun Wang, Kai Xu, Zhen-Dong Wei, Wei Han, Ying-Jie Zhang, Zhong-Xiao Man, Yun-Jie Xia
{"title":"Classical-driving-assisted qubit-array quantum battery.","authors":"Zai-Kun Wang, Kai Xu, Zhen-Dong Wei, Wei Han, Ying-Jie Zhang, Zhong-Xiao Man, Yun-Jie Xia","doi":"10.1103/PhysRevE.111.014121","DOIUrl":"https://doi.org/10.1103/PhysRevE.111.014121","url":null,"abstract":"<p><p>We discuss a one-dimensional coupled qubit-array quantum battery model under Born-Karman boundary conditions and investigate both the charging and discharging processes. Applying the stored energy, charging power, and ergotropy as the essential physical indicators of quantum battery, it is observed that minimizing the hopping interaction between the nearest-neighbor qubits in the qubit-array and increasing the number of qubits during battery setup are crucial. Additionally, we employ a classical driving field to optimize battery performance and explore the optimal quantum battery performance by adjusting the driving strength of the classical field. Finally, we have discovered that the initial energy in the charger no longer needs to be higher than the energy in the battery in our protocol, the charger will continue to supply energy to the battery even when there is limited initial available energy in the charger. And the conventional approach of preparing the battery's initial state in its ground state, as observed in previous studies, may not necessarily be the optimal choice. By introducing a strong classical driving field, it is possible to enhance energy storage by allowing for an initial presence of some energy within the battery.</p>","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"111 1-1","pages":"014121"},"PeriodicalIF":2.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143459053","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
Open-system eigenstate thermalization in a noninteracting integrable model. 非相互作用可积模型中的开系统本征态热化。
IF 2.4 3区 物理与天体物理
Physical review. E Pub Date : 2025-01-01 DOI: 10.1103/PhysRevE.111.014129
Krzysztof Ptaszyński, Massimiliano Esposito
{"title":"Open-system eigenstate thermalization in a noninteracting integrable model.","authors":"Krzysztof Ptaszyński, Massimiliano Esposito","doi":"10.1103/PhysRevE.111.014129","DOIUrl":"https://doi.org/10.1103/PhysRevE.111.014129","url":null,"abstract":"<p><p>Significant attention has been devoted to the problem of thermalization of observables in isolated quantum setups by individual eigenstates. Here, we address this issue from an open quantum system perspective, examining an isolated setup where a small system (specifically, a single fermionic level) is coupled to a macroscopic fermionic bath. We argue that in such a model, despite its full integrability, the system observables exhibit thermalization when the system-bath setup resides in a typical eigenstate of its Hamiltonian, a phenomenon known as weak eigenstate thermalization. This thermalization occurs unless it is suppressed by localization due to strong coupling. We further show that, following the quench of the system Hamiltonian, the system occupancy typically relaxes to the thermal value corresponding to the new Hamiltonian. Finally, we demonstrate that system thermalization also arises when the system is coupled to a bath that has been initialized in a typical eigenstate of its Hamiltonian. Our findings suggest that nonintegrability is not the sole driver of thermalization, highlighting the need for complementary approaches to fully understand the emergence of statistical mechanics.</p>","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"111 1-1","pages":"014129"},"PeriodicalIF":2.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143459221","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
Perspective on equal and cross-frequency neural coupling: Integration and segregation of the function of brain networks. 等频与交叉频神经耦合的视角：脑网络功能的整合与分离。
IF 2.4 3区 物理与天体物理
Physical review. E Pub Date : 2025-01-01 DOI: 10.1103/PhysRevE.111.014408
Diego M Mateos, Jose Luis Perez Velazquez
{"title":"Perspective on equal and cross-frequency neural coupling: Integration and segregation of the function of brain networks.","authors":"Diego M Mateos, Jose Luis Perez Velazquez","doi":"10.1103/PhysRevE.111.014408","DOIUrl":"https://doi.org/10.1103/PhysRevE.111.014408","url":null,"abstract":"<p><p>We introduce a perspective that has not appeared before in the field of equal and multifrequency coupling derived from considering neuronal synchrony as a possible equivalence relation. The experimental results agree with the theoretical prediction that cross-frequency coupling results in a partition of the brain synchrony state space. We place these results in the framework of the integration and segregation of information in the processing of sensorimotor transformations by the brain cell circuits and propose that equal-frequency (1:1) connectivity favors integration of information in the brain whereas cross-frequency coupling (n:m) favors segregation. These observations may provide an outlook about how to reconcile the need for stability in the brain's operations with the requirement for diversity of activity in order to process many sensorimotor transformations simultaneously.</p>","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"111 1-1","pages":"014408"},"PeriodicalIF":2.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143459226","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
Analytical interaction potential for Lennard-Jones rods. Lennard-Jones棒的分析相互作用势。
IF 2.4 3区 物理与天体物理
Physical review. E Pub Date : 2025-01-01 DOI: 10.1103/PhysRevE.111.015403
Junwen Wang, Gary D Seidel, Shengfeng Cheng
{"title":"Analytical interaction potential for Lennard-Jones rods.","authors":"Junwen Wang, Gary D Seidel, Shengfeng Cheng","doi":"10.1103/PhysRevE.111.015403","DOIUrl":"https://doi.org/10.1103/PhysRevE.111.015403","url":null,"abstract":"<p><p>An analytical form has been derived using Ostrogradsky's integration method for the interaction between two thin rods of finite lengths in arbitrary relative configurations in a three-dimensional space, each treated as a line of point particles interacting through the Lennard-Jones 12-6 potential. Simplified analytical forms for coplanar, parallel, and collinear rods are also derived. Exact expressions for the force and torque between the rods are obtained. Similar results for a point particle interacting with a thin rod are provided. These interaction potentials can be widely used for analytical descriptions and computational modeling of systems involving rodlike objects such as liquid crystals, colloids, polymers, elongated viruses and bacteria, and filamentous materials including carbon nanotubes, nanowires, biological filaments, and their bundles.</p>","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"111 1-2","pages":"015403"},"PeriodicalIF":2.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143459073","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
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