Physical Review E最新文献_第7页

Stochastic model for the turbulent ocean heat flux under Arctic sea ice. 北极海冰下湍流海洋热通量的随机模型。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2025-02-01 DOI: 10.1103/PhysRevE.111.025101

S Toppaladoddi, A J Wells

{"title":"Stochastic model for the turbulent ocean heat flux under Arctic sea ice.","authors":"S Toppaladoddi, A J Wells","doi":"10.1103/PhysRevE.111.025101","DOIUrl":"https://doi.org/10.1103/PhysRevE.111.025101","url":null,"abstract":"The physics of planetary climate features a variety of complex systems that are challenging to model as they feature turbulent flows. A key example is the heat flux from the upper ocean to the underside of sea ice which provides a key contribution to the evolution of the Arctic sea ice cover. Here, we develop a model of the turbulent ice-ocean heat flux using coupled ordinary stochastic differential equations to model fluctuations in the vertical velocity and temperature in the Arctic mixed layer. All the parameters in the model are determined from observational data. A detailed comparison between the model results and measurements made during the Surface Heat Budget of the Arctic Ocean (SHEBA) project reveals that the model is able to capture the probability density functions (PDFs) of velocity, temperature, and heat flux fluctuations. Furthermore, we show that the temperature in the upper layer of the Arctic Ocean can be treated as a passive scalar during the whole year of SHEBA measurements. The stochastic model developed here provides a computationally inexpensive way to compute an observationally consistent PDF of this heat flux and has implications for its parametrization in regional and global climate models.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":"111 2-2","pages":"025101"},"PeriodicalIF":2.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143659399","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

Shell models on recurrent sequences: Fibonacci, Padovan, and other series. 循环序列的壳模型：斐波那契、帕多万和其他序列。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2025-02-01 DOI: 10.1103/PhysRevE.111.025103

L Manfredini, Ö D Gürcan

{"title":"Shell models on recurrent sequences: Fibonacci, Padovan, and other series.","authors":"L Manfredini, Ö D Gürcan","doi":"10.1103/PhysRevE.111.025103","DOIUrl":"https://doi.org/10.1103/PhysRevE.111.025103","url":null,"abstract":"A class of shell models is proposed where the shell variables are defined on a recurrent sequence of integer wave numbers such as the Fibonacci or the Padovan series or their variations, including a sequence made of square roots of Fibonacci numbers rounded to the nearest integer. Considering the simplest model, which involves only local interactions, the interaction coefficients can be generalized in such a way that the inviscid invariants, such as energy and helicity, can be conserved even though there is no exact self-similarity. It is shown that these models basically have identical features with standard shell models and produce the same power-law spectra, similar spectral fluxes, and analogous deviation from self-similar scaling of the structure functions, implying comparable levels of turbulent intermittency. Such a formulation potentially opens up the possibility of using shell models, or their generalizations along with discretized regular grids such as those found in direct numerical simulations, as either diagnostic tools or subgrid models. It also allows us to develop models where the wave-number shells can be interpreted as sparsely decimated sets of wave numbers over an initially regular grid. In addition to conventional shell models with local interactions that result in forward cascade, a particular a helical shell model with long-range interactions is considered on a similarly recurrent sequence of wave numbers, corresponding to the Fibonacci series, and found to result in the usual inverse cascade.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":"111 2-2","pages":"025103"},"PeriodicalIF":2.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143659405","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

Stark effect at high electric fields and Stark ion broadening widths and shifts for different microfield distributions at quasistatic approximation in atomic oxygen spectra. 原子氧光谱准静态近似下不同微场分布的Stark效应和Stark离子展宽宽度和位移。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2025-02-01 DOI: 10.1103/PhysRevE.111.025209

S Werbowy, B Pranszke, L Windholz

{"title":"Stark effect at high electric fields and Stark ion broadening widths and shifts for different microfield distributions at quasistatic approximation in atomic oxygen spectra.","authors":"S Werbowy, B Pranszke, L Windholz","doi":"10.1103/PhysRevE.111.025209","DOIUrl":"https://doi.org/10.1103/PhysRevE.111.025209","url":null,"abstract":"Studies of the static Stark effect are reported for the multiplets at 615.8, 645.6, 777.6, 822.4, 844.9, and 926.5 nm (vacuum wavelengths) of atomic oxygen, which are important for various applications. From the Stark patterns recorded at very high electric fields up to 780 kV/cm, we have determined the differences of the scalar polarizabilities Δα_{0} and the tensor polarizabilities α_{2} for the investigated lines. For most of the lines we present the first-obtained experimental results. The Stark broadening of the studied lines by non-neutral plasmas in the ion density range of 10^{13}-10^{19}cm^{-3} was analyzed based on these results. The quasistatic approximation and three distinct microfield distributions were employed, which corresponded to different types of coupling in the plasma, namely the Holtzmark, Mayer, and irregular cluster distributions. Ion broadened widths and shifts were obtained from the simulated line shapes for different microfield distributions and ion densities. The analysis of these outcomes enabled us to determine their correlations with the independently determined Δα_{0} and microfield distribution, ultimately enabling us to ascertain the contour of the microfield distribution itself.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":"111 2-2","pages":"025209"},"PeriodicalIF":2.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143659418","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

Coevolutionary game dynamics with localized environmental resource feedback. 局域环境资源反馈的协同进化博弈动力学。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2025-02-01 DOI: 10.1103/PhysRevE.111.024305

Yi-Duo Chen, Jian-Yue Guan, Zhi-Xi Wu

{"title":"Coevolutionary game dynamics with localized environmental resource feedback.","authors":"Yi-Duo Chen, Jian-Yue Guan, Zhi-Xi Wu","doi":"10.1103/PhysRevE.111.024305","DOIUrl":"https://doi.org/10.1103/PhysRevE.111.024305","url":null,"abstract":"Dynamic environments shape diverse dynamics in evolutionary game systems. We introduce spatial heterogeneity of resources into the prisoner's dilemma game model to explore coevolutionary game dynamics with environmental feedback. The availability of resources significantly affects the survival competitiveness of surrounding individuals. Feedback between individuals' strategies and the resources they can use leads to the oscillating dynamic known as the \"oscillatory tragedy of the commons.\" Our findings indicate that when the influence of individuals' strategies on the update rate of resources is significantly high in systems characterized by environmental heterogeneity, they can attain an equilibrium state that avoids the oscillatory tragedy. In contrast to the numerical results obtained in well-mixed structures, self-organized clustered patterns emerge in simulations utilizing square lattices, further enhancing the stability of the system. We discuss critical phenomena in detail, demonstrating that the aforementioned transition is robust across various system parameters, including the strength of cooperators in restoring the environment, initial distributions of cooperators, system size and structures, and noise.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":"111 2-1","pages":"024305"},"PeriodicalIF":2.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143659508","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

Diffusion equation and rare fluctuations of the biased aging continuous-time random-walk model. 偏置老化连续时间随机游走模型的扩散方程及罕见波动。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2025-02-01 DOI: 10.1103/PhysRevE.111.024138

Yuanze Hong, Tian Zhou, Wanli Wang

引用次数: 0

Emergence of the three-dimensional diluted Ising model universality class in a mixture of two magnets. 两磁体混合物中三维稀释伊辛模型普遍性类别的出现。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2025-02-01 DOI: 10.1103/PhysRevE.111.024127

J J Ruiz-Lorenzo, M Dudka, M Krasnytska, Yu Holovatch

{"title":"Emergence of the three-dimensional diluted Ising model universality class in a mixture of two magnets.","authors":"J J Ruiz-Lorenzo, M Dudka, M Krasnytska, Yu Holovatch","doi":"10.1103/PhysRevE.111.024127","DOIUrl":"https://doi.org/10.1103/PhysRevE.111.024127","url":null,"abstract":"Usually, the impact of structural disorder on the magnetic phase transition in the 3D Ising model is analyzed within the framework of quenched dilution by a nonmagnetic component, where some lattice sites are occupied by Ising spins, while others are nonmagnetic. This kind of quenched dilution, according to the Harris criterion, leads to a change in the critical exponents that govern the asymptotics in the vicinity of the phase transition point. However, the inherent reason for the emergence of a new, random Ising model universality class is not the presence of a nonmagnetic component, but the disorder in structure of spin arrangement. To demonstrate this fact, in this paper we set up extensive Monte Carlo simulations of a random mixture of two Ising-like magnets that differ in spin length s and concentration c. In doing so, we analyze the effect of structural disorder per se without appealing to the presence of a nonmagnetic component. We support our numerical simulations with renormalization group calculations. Our results demonstrate the emergence of the 3D randomly diluted Ising model universality class in a random mixture of two Ising magnets. While the asymptotic critical exponents coincide with those known for the site-diluted 3D Ising model, the effective critical behavior is triggered by parameters s and c. The impact of their interplay is a subject of detailed analysis.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":"111 2-1","pages":"024127"},"PeriodicalIF":2.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143657946","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

Universality of giant diffusion in tilted periodic potentials. 倾斜周期势中巨扩散的普遍性。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2025-02-01 DOI: 10.1103/PhysRevE.111.024113

Kento Iida, Takuma Akimoto, Andreas Dechant

引用次数: 0

Generalized Hamiltonian of mean-force approach to open quantum systems coupled to finite baths in thermoequilibrium. 热平衡中有限槽耦合开放量子系统的广义哈密顿平均力方法。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2025-02-01 DOI: 10.1103/PhysRevE.111.024139

Xuerui Du, Jianhui Wang, Yongli Ma

{"title":"Generalized Hamiltonian of mean-force approach to open quantum systems coupled to finite baths in thermoequilibrium.","authors":"Xuerui Du, Jianhui Wang, Yongli Ma","doi":"10.1103/PhysRevE.111.024139","DOIUrl":"https://doi.org/10.1103/PhysRevE.111.024139","url":null,"abstract":"The prevailing method for addressing strong-coupling thermodynamics typically involves open quantum systems coupled to infinite baths in equilibrium through the Hamiltonian of mean force (HMF). However, its applicability to finite baths remains limited. In this work, we transcend this limit by considering the impacts of system-bath coupling which is not only on the system but also on the finite bath feedback. When the bath and system sizes are comparable, they act as each other's effective 'bath'. We introduce a parameter α within [0,1], where α and 1-α act as weighting factors to distribute the system-bath coupling between the system and the bath. Our approach innovatively incorporates the effect of coupling on the respective effective 'bath' into both the system and bath in the statistical factor form. We generalize the HMF and propose quantum Hamiltonians of mean forces to handle the distributed coupling of the system to finite baths. The additional parameter α is determined by minimizing the joint free energy density and is a new thermodynamic quantity representing the finite bath's influence. Examining the damped quantum harmonic oscillator with a finite bath, we find that α affects both states, leading to a complex phase diagram with unique phenomena at critical temperatures T_{L} and T_{R}, including valleys, peaks, negative values, and discontinuities in entropy and specific heat. Notably, these anomalies disappear when α→1, both at high temperatures and in the thermodynamic limit, indicating the negligible influence of coupling on the bath states and reverting to the HMF. Thus, studying finite-sized baths holds substantial significance in small quantum systems.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":"111 2-1","pages":"024139"},"PeriodicalIF":2.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143659123","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

Power-efficiency constraint for chemical motors. 化工电机的功率效率约束。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2025-02-01 DOI: 10.1103/PhysRevE.111.024404

R X Zhai, Hui Dong

引用次数: 0

Controlling multistimuli elastic response by bistable micromodules. 双稳态微模块控制多刺激弹性响应。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2025-02-01 DOI: 10.1103/PhysRevE.111.025403

Sven Pattloch, Joachim Dzubiella

{"title":"Controlling multistimuli elastic response by bistable micromodules.","authors":"Sven Pattloch, Joachim Dzubiella","doi":"10.1103/PhysRevE.111.025403","DOIUrl":"https://doi.org/10.1103/PhysRevE.111.025403","url":null,"abstract":"Controlling the elastic response of materials to multiple stimuli is a key prerequisite for the design of adaptive soft matter, e.g., for applications in medicine or soft robotics. Here, we discuss a statistical mechanics model in which the nonlinear elastic response is governed by mechanically coupled bistable micromodules which can be switched by external stimuli. Exact analytical solutions show complex stimuli-mediated, nonlinear stiffening/softening responses tuneable by the microscopic switching parameters. Importantly, we report up to two maxima in the softness (compliance) originating from cooperative transitions and show how to control their existence and properties. We demonstrate the usefulness of the model by fitting it to experimental extension-force data on various scales. We further illustrate how to explore the entire nonlinear response map as a function of multiple stimuli, utilizing distinct pathways to either cancel/reset or amplify the elastic responses through a combination of these stimuli. Our analysis should be useful for the design of nonlinear elasticity, e.g., in bistable microgel networks or mechanical metamaterials.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":"111 2-2","pages":"025403"},"PeriodicalIF":2.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143659211","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