Physica A: Statistical Mechanics and its Applications最新文献

{"title":"Strategy evolution of network conformists and rational imitators in the rock–paper–scissors game","authors":"Xianjia Wang ,&nbsp;Ke Liu ,&nbsp;Zhipeng Yang","doi":"10.1016/j.physa.2025.130611","DOIUrl":"10.1016/j.physa.2025.130611","url":null,"abstract":"<div><div>The rock–paper–scissors game is a classic example of a three-strategy game in evolutionary game theory, widely employed to study the dynamics of strategy evolution. How to introduce different strategy update rules in the rock–paper–scissors game to study the evolution of strategies is a question worth exploring. In this study, two types of individuals are introduced within a finite and structured population: conformists and rational imitators. Distinct strategy update rules are formulated for each individual type. Conformists update their strategies according to the conformity process, whereas rational imitators update their strategies based on the death–birth process. During the strategy update process, individuals not only adjust their strategies but may also change their types and alter the network structure. Specifically, individuals introduce network dynamics by severing their connection with the neighbor that has the lowest weighted payoff and randomly establishing a new connection with an unconnected individual. This study simulates the aforementioned process on WS small-world and regular networks. The results show that as the proportion of initial rational imitators and the selection intensity increase, the population reaches a stable state more quickly. Over time, the proportion of individuals adopting the same strategy tends to converge across both types. Moreover, we find that the evolutionary outcomes on the WS small-world network are similar to those on the regular network.</div></div>","PeriodicalId":20152,"journal":{"name":"Physica A: Statistical Mechanics and its Applications","volume":"669 ","pages":"Article 130611"},"PeriodicalIF":2.8,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878870","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}

{"title":"Distributed sliding mode control strategy based on adaptive reaching law for intelligent and connected vehicle platoon car-following system","authors":"Yunlong Zhuang,&nbsp;Tao Song,&nbsp;Wen-Xing Zhu","doi":"10.1016/j.physa.2025.130629","DOIUrl":"10.1016/j.physa.2025.130629","url":null,"abstract":"<div><div>This study investigates the nonlinear sliding mode controller based on car-following system. To address the issues of chattering and finite-time convergence in sliding mode control (SMC), an adaptive SMC based on adaptive theory is proposed. The performance of controller is theoretically analyzed using the Lyapunov function. The analysis indicates that the system can converge within a finite time, and both dynamic performance and robustness are improved. To verify the effectiveness and practicality of the controller, this paper first carried out numerical simulation in MATLAB, and then used four unmanned cars for real car verification. The results show that the controller proposed in this study enables the system to converge within a finite time, greatly reduce the chattering of the system, and reduce the convergence time. The controller ensures the stability of the car-following system, and provides strong resistance to disturbances. The experimental results are consistent with the theoretical analysis.</div></div>","PeriodicalId":20152,"journal":{"name":"Physica A: Statistical Mechanics and its Applications","volume":"669 ","pages":"Article 130629"},"PeriodicalIF":2.8,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869634","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}

{"title":"Quantum heat engine with near-zero irreversible work utilizing quantum skyrmion working substance","authors":"Vipin Vijayan ,&nbsp;L. Chotorlishvili ,&nbsp;A. Ernst ,&nbsp;M.I. Katsnelson ,&nbsp;S.S.P. Parkin ,&nbsp;Sunil K. Mishra","doi":"10.1016/j.physa.2025.130599","DOIUrl":"10.1016/j.physa.2025.130599","url":null,"abstract":"<div><div>The primary obstacle in the field of quantum thermodynamics revolves around the development and practical implementation of quantum heat engines operating at the nanoscale. One of the key challenges associated with quantum working bodies is “quantum friction,” which refers to irreversible wasted work resulting from quantum inter-level transitions. Consequently, the construction of a reversible quantum cycle necessitates the utilization of adiabatic shortcuts. However, the experimental realization of such shortcuts for realistic quantum substances is exceedingly complex and often unattainable for realistic materials. In this study, we propose a quantum heat engine that capitalizes on the plasmonic skyrmion lattice. Through rigorous analysis, we demonstrate that the quantum skyrmion substance exhibits near-zero irreversible work owing to its topological protection. Consequently, our engine operates without the need for adiabatic shortcuts. We checked by numerical calculations and observed that when the system is in the quantum skyrmion phase, the propagated states differ from the initial states only by the geometrical and dynamical phases. The adiabatic evolution leads to near-zero transition matrix elements, consequently the system demonstrates near-zero irreversible entropy. By employing plasmonic mods and an electric field, we drive the quantum cycle. The fundamental building blocks for constructing the quantum working body are individual skyrmions within the plasmonic lattice. As a result, one can precisely control the output power of the engine and the thermodynamic work accomplished by manipulating the number of quantum skyrmions present.</div></div>","PeriodicalId":20152,"journal":{"name":"Physica A: Statistical Mechanics and its Applications","volume":"669 ","pages":"Article 130599"},"PeriodicalIF":2.8,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869635","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}

{"title":"Quantum Otto engines with curvature-dependent efficiency: An analog model approach","authors":"Somayeh Kourkinejat ,&nbsp;Ali Mahdifar ,&nbsp;Ehsan Amooghorban","doi":"10.1016/j.physa.2025.130600","DOIUrl":"10.1016/j.physa.2025.130600","url":null,"abstract":"<div><div>In this paper, we explore a quantum Otto cycle with a quantum harmonic oscillator on a circle as its working substance. Since the eigenenergies of this oscillator depend on the curvature of the circle, this model, as an analog model, enables us to investigate the curvature effects of the physical space on properties of quantum heat engines. We consider two classical hot and cold thermal baths located in regions with different curvatures. By calculating the curvature-dependent work and heat in the Otto cycle, we emphasize the role of curvature in determining the thermal efficiency of the heat engine. Notably, we demonstrate that by adjusting the curvature difference between the bath locations, the engine’s efficiency can approach the Carnot limit.</div></div>","PeriodicalId":20152,"journal":{"name":"Physica A: Statistical Mechanics and its Applications","volume":"669 ","pages":"Article 130600"},"PeriodicalIF":2.8,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869636","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}

{"title":"Evolutionary analysis of a simple Minority Game: Coexistence, dominance, and paradoxical outcomes","authors":"Guilherme Fernandes,&nbsp;Lucas Wardil","doi":"10.1016/j.physa.2025.130592","DOIUrl":"10.1016/j.physa.2025.130592","url":null,"abstract":"<div><div>The Minority Game models the El Farol Bar problem, where individuals decide whether to attend the bar based on expected crowd size. Despite extensive study, the interactions between specific strategies remain underexplored due to the model’s complexity. In this work, we analyze a simplified version of the Minority Game where each player follows a fixed strategy based solely on the outcome of the last winning action. We demonstrate that the long-term population dynamics is determined by two key inequalities that are defined in terms of the number of strategies in the population. Using an evolutionary framework with a death-and-birth process, we perform an invasion analysis to study how a single mutant strategy interacts with a resident population. Our results reveal two possible evolutionary outcomes: stable coexistence of competing strategies or dominance of one strategy, which paradoxically leads to its own disadvantage by becoming the majority. However, by extending our evolutionary analysis to the full set of strategies, we demonstrate that evolutionary dynamics consistently drive the system toward the coexistence of two strategies, preventing the paradoxical outcome.</div></div>","PeriodicalId":20152,"journal":{"name":"Physica A: Statistical Mechanics and its Applications","volume":"669 ","pages":"Article 130592"},"PeriodicalIF":2.8,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873199","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}

{"title":"Nonlocal coherent states in an infinite array of boson sites","authors":"A.P. Sowa ,&nbsp;J. Fransson","doi":"10.1016/j.physa.2025.130606","DOIUrl":"10.1016/j.physa.2025.130606","url":null,"abstract":"<div><div>A regular coherent state (CS) is a special type of quantum state for boson particles placed in a single site. The defining feature of the CS is that it is an eigenmode of the annihilation operator. The construction easily generalizes to the case of a finite number of sites. However, the challenge is altogether different when one considers an infinite array of sites. In this work we demonstrate a mathematically rigorous construction that resolves the latter case. The resulting nonlocal coherent states (NCS) are simultaneous eigenmodes for all of the infinitely many annihilation operators acting in the infinite array’s Fock space. Our construction fundamentally relies on Dirichlet series-based analysis and number theoretic arguments.</div></div>","PeriodicalId":20152,"journal":{"name":"Physica A: Statistical Mechanics and its Applications","volume":"669 ","pages":"Article 130606"},"PeriodicalIF":2.8,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864597","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}

{"title":"Stability diagram and parametric excitation in a strongly interacting fermionic superfluid","authors":"Haoting Li ,&nbsp;Wen Wen ,&nbsp;Jun Wan ,&nbsp;Hui-jun Li ,&nbsp;Ying Wang","doi":"10.1016/j.physa.2025.130590","DOIUrl":"10.1016/j.physa.2025.130590","url":null,"abstract":"<div><div>We investigate, both analytically and numerically, the dynamics of an elongated and strongly interacting fermionic superfluid subjected to a periodic modulation of tightly transverse confinement. We start from an effective one-dimensional (1D) model that is obtained by integrating over the transverse degree of freedom in the Thomas–Fermi regime due to the strong interaction. Using the approach of complex Fourier series, we solve the damped Mathieu equation derived from the 1D model, and compare the stability diagrams between the strongly and weakly interacting regimes. We further numerically simulate the effective 1D model with the parameters as in experiment to study the Faraday-wave formation, as well as excitations in a low-frequency modulation. Our analytical and numerical findings can provide a theoretical support for the experiments on the observation of the Faraday waves in a strongly correlated regime.</div></div>","PeriodicalId":20152,"journal":{"name":"Physica A: Statistical Mechanics and its Applications","volume":"669 ","pages":"Article 130590"},"PeriodicalIF":2.8,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864596","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}

{"title":"Theoretical aspects of magnetic phase transitions in LaMnO3 perovskite","authors":"Rubens H.M. Morais ,&nbsp;Gabriel B.B. Nascimento ,&nbsp;Raul G.B. Mendes ,&nbsp;Samuel de Oliveira ,&nbsp;Jander P. Santos","doi":"10.1016/j.physa.2025.130588","DOIUrl":"10.1016/j.physa.2025.130588","url":null,"abstract":"<div><div>This work investigates theoretical aspects of magnetic phase transitions in manganite LaMnO<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>. The study focuses on the lattice composed of the sites occupied by the <span><math><mrow><mi>M</mi><msup><mrow><mi>n</mi></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></mrow></math></span> ions, which present antiferromagnetic coupling with coordination number of six. The lattice spins are described by the spin-2 Blume–Capel model and its magnetic and thermodynamic properties are investigated using Mean Field Theory and Effective Field Theory. The behavior of the system is studied as a function of the anisotropic parameter and the external magnetic field, presenting numerical results used to construct magnetization, entropy, magnetocaloric potential and phase diagrams, highlighting regions with first and second order magnetic phase transitions, as well as tricritical and terminal points.</div></div>","PeriodicalId":20152,"journal":{"name":"Physica A: Statistical Mechanics and its Applications","volume":"669 ","pages":"Article 130588"},"PeriodicalIF":2.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845207","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}

{"title":"Dynamic heterogeneities in stock markets","authors":"Laura Molero-González ,&nbsp;Juan E. Trinidad-Segovia ,&nbsp;Miguel Ángel Sánchez-Granero ,&nbsp;Joaquim Clara-Rahola ,&nbsp;Antonio M. Puertas","doi":"10.1016/j.physa.2025.130567","DOIUrl":"10.1016/j.physa.2025.130567","url":null,"abstract":"<div><div>The dynamics of the New York Stock Exchange during the past decade is studied using observables borrowed from the study of glass-forming liquids. Using the log-price as equivalent to the particle position, the density autocorrelation function is calculated, which shows a stretched exponential decay. The Kohlrausch law correctly describes the decay, and the dependencies of the stretching exponent and time-scale with the wavenumber follow the same trends as for supercooled liquids. The equivalent of the overlap correlation function is also calculated and analyzed. The dynamic heterogeneities are studied using the non-Gaussian parameter and the dynamic susceptibilities, calculated from both correlation functions. The dynamic susceptibility grows from zero at short times to describe a maximum in the same time scale as the decay of the corresponding correlation function, and decays back to zero for long times. Finally, we show that avalanches of all sizes are present in the system, mimicking critical behavior previously discussed in glasses.</div></div>","PeriodicalId":20152,"journal":{"name":"Physica A: Statistical Mechanics and its Applications","volume":"669 ","pages":"Article 130567"},"PeriodicalIF":2.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855667","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}

{"title":"A novel graph neural network framework for resting-state functional MRI spatiotemporal dynamics analysis","authors":"Tao Wang ,&nbsp;Zenghui Ding ,&nbsp;Zheng Chang ,&nbsp;Xianjun Yang ,&nbsp;Yanyan Chen ,&nbsp;Meng Li ,&nbsp;Shu Xu ,&nbsp;Yu Wang","doi":"10.1016/j.physa.2025.130582","DOIUrl":"10.1016/j.physa.2025.130582","url":null,"abstract":"<div><h3>Background:</h3><div>Graph neural networks (GNNs) are essential for studying brain functional connectivity and neural network activity, but the high dimensionality and complexity of resting-state functional magnetic resonance imaging (rs-fMRI), coupled with its spatiotemporal dynamic characteristics, pose challenges for traditional GNNs in spatiotemporal dynamic analysis.</div></div><div><h3>Methods:</h3><div>This paper proposes a novel GNN framework aimed at the spatiotemporal dynamic analysis of rs-fMRI data. The framework constructs static spatial graphs and dynamic temporal graphs from rs-fMRI data. Then, a GNN is employed to extract spatial features, and a long short-term memory network (LSTM) is used to capture dynamics temporal features. Additionally, a diffusion connection strategy is implemented to facilitate the interaction between static spatial information and dynamic temporal information, enhancing the model’s stability and generalization capability. To achieve effective fusion of spatiotemporal information, an adaptive fusion method based on a self-attention mechanism is introduced, which improves the model’s ability to represent complex spatiotemporal patterns.</div></div><div><h3>Results:</h3><div>Experimental results on two public datasets demonstrate that this framework performs excellently in brain region connectivity classification task. Compared to traditional methods and existing GNN models, this framework significantly improves classification accuracy and model robustness, proving its superiority and practicality in the analysis of rs-fMRI data.</div></div><div><h3>Conclusion:</h3><div>The proposed GNN framework provides an effective tool for spatiotemporal dynamic analysis of rs-fMRI data. This method not only enhances the understanding of complex brain network structures but also shows great potential in practical applications, promising to advance further research in brain science.</div></div>","PeriodicalId":20152,"journal":{"name":"Physica A: Statistical Mechanics and its Applications","volume":"669 ","pages":"Article 130582"},"PeriodicalIF":2.8,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845208","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}