Physical review. E最新文献

Canonical equilibrium of mean-field O(n) models in the presence of random fields. 随机场存在下平均场O(n)模型的典型平衡。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2025-08-01 DOI: 10.1103/nhkq-sb63

Soumya Kanti Pal, Shamik Gupta

{"title":"Canonical equilibrium of mean-field O(n) models in the presence of random fields.","authors":"Soumya Kanti Pal, Shamik Gupta","doi":"10.1103/nhkq-sb63","DOIUrl":"https://doi.org/10.1103/nhkq-sb63","url":null,"abstract":"We study canonical-equilibrium properties of random field O(n) models involving classical continuous vector spins of n components with mean-field interactions and subject to disordered fields acting on individual spins. To this end, we employ two complementary approaches: the mean-field approximation, valid for any disorder distribution, and the replica trick, applicable when the disordered fields are sampled from a Gaussian distribution. On the basis of an exact analysis, we demonstrate that when replica symmetry holds, both the approaches yield identical expression for the free energy per spin of the system. As consequences, we study the case of n=2 (XY spins) and that of n=3 (Heisenberg spins) for two representative choices of the disorder distribution, namely, a Gaussian and a symmetric bimodal distribution. For both n=2 and n=3, we demonstrate that while the magnetization exhibits a continuous phase transition as a function of temperature for the Gaussian case, the transition could be either continuous or first order with an emergent tricriticality when the disorder distribution is bimodal. We also discuss in the context of our models the issue of self-averaging of extensive variables near the critical point of a continuous phase transition.","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"112 2-1","pages":"024104"},"PeriodicalIF":2.4,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145069519","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

O(5) multicriticality in the three-dimensional two-flavor SU(2) lattice gauge Higgs model. 三维双味SU(2)晶格规范希格斯模型中的O(5)多重临界性。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2025-08-01 DOI: 10.1103/l6wr-6p69

Claudio Bonati, Ivan Calero Soler

引用次数: 0

Entanglement generation across exceptional points in a two-qubit open quantum system: The role of initial states. 双量子位开放量子系统中异常点的纠缠产生：初始态的作用。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2025-08-01 DOI: 10.1103/24cd-939t

B A Tay, Yee Shean H'ng

引用次数: 0

Edge correlations and link prediction in growing hypergraphs. 生长超图中的边缘关联和链接预测。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2025-08-01 DOI: 10.1103/4lkd-mtzq

Xie He, Philip S Chodrow, Peter J Mucha

引用次数: 0

Fluctuation-dominated phase ordering in the one-dimensional truncated inverse-distance square Ising model. 一维截断逆距离平方Ising模型中波动主导的相位排序。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2025-08-01 DOI: 10.1103/5l43-3rl9

Souvik Sadhukhan, Mustansir Barma, Saroj Kumar Nandi

{"title":"Fluctuation-dominated phase ordering in the one-dimensional truncated inverse-distance square Ising model.","authors":"Souvik Sadhukhan, Mustansir Barma, Saroj Kumar Nandi","doi":"10.1103/5l43-3rl9","DOIUrl":"https://doi.org/10.1103/5l43-3rl9","url":null,"abstract":"Many physical systems, including some examples of active matter, granular assemblies, and biological systems, show fluctuation-dominated phase ordering (FDPO), where macroscopic fluctuations coexist with long-range order. Most of these systems are out of equilibrium. By contrast, a recent work has analytically demonstrated that an equilibrium one-dimensional truncated inverse distance square Ising (TIDSI) model shows FDPO. The analytical results rely on a cluster representation of the model that we term TIDSI-CL and are governed by the ratio, c, of the long-range interaction strength to the critical temperature. We show that the allowed range of c is very narrow in the original TIDSI model while it is unbounded in TIDSI-CL. We perform Monte Carlo simulations for the TIDSI model and show consistency with the analytical results in the allowed range of c. The correlation length grows strongly on approaching the critical point, leading to a broad near-critical region. Within this region, α, which is the cusp exponent of the power-law decay of the scaled correlation function at criticality, changes to α^{eff}. We also investigate the coarsening dynamics of the model: The correlation function, domain size distribution, and aging behavior are consistent with the equilibrium properties upon replacing the system size, L, by the coarsening length, L(t). The mean largest cluster size shows logarithmic corrections due to finite L and waiting time, t_{w}. The aging autocorrelation function exhibits two different scaling forms, characterized by exponents β and γ, at short and long times compared to t_{w}, where β=α/2.","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"112 2-1","pages":"024114"},"PeriodicalIF":2.4,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145070219","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

Simple Ising ferromagnet with chiral interactions. 具有手性相互作用的简单伊辛铁磁体。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2025-08-01 DOI: 10.1103/cwxt-xqmc

William de Castilho, S R Salinas

引用次数: 0

Impact of network assortativity on disease lifetime in the SIS model of epidemics. 流行病SIS模型中网络选型对疾病寿命的影响。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2025-08-01 DOI: 10.1103/j147-hgsx

Elad Korngut, Michael Assaf

{"title":"Impact of network assortativity on disease lifetime in the SIS model of epidemics.","authors":"Elad Korngut, Michael Assaf","doi":"10.1103/j147-hgsx","DOIUrl":"10.1103/j147-hgsx","url":null,"abstract":"To accurately represent disease spread, epidemiological models must account for the complex network topology and contact heterogeneity. Traditionally, most studies have used random heterogeneous networks, which ignore correlations between the nodes' degrees. Yet, many real-world networks exhibit degree assortativity-the tendency for nodes with similar degrees to connect. Here we explore the effect degree assortativity (or disassortativity) has on long-term dynamics and disease extinction in the realm of the susceptible-infected-susceptible model on heterogeneous networks. We derive analytical results for the mean time to extinction (MTE) in assortative networks with weak heterogeneity, and show that increased assortativity reduces the MTE and that assortativity and degree heterogeneity are interchangeable with regard to their impact on the MTE. Our analytical results are verified using the weighted ensemble numerical method, on both synthetic and real-world networks. Notably, this method allows us to go beyond the capabilities of traditional numerical tools, enabling us to study rare events in large assortative networks, which were previously inaccessible.","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"112 2-1","pages":"024302"},"PeriodicalIF":2.4,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145070290","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

Effect of microalloying via soft and hard random pinning on the yielding transition of amorphous solids under oscillatory shear. 软、硬随机钉钉微合金化对振荡剪切作用下非晶固体屈服转变的影响。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2025-08-01 DOI: 10.1103/4bjr-74m6

Roni Chatterjee, Monoj Adhikari, Smarajit Karmakar

{"title":"Effect of microalloying via soft and hard random pinning on the yielding transition of amorphous solids under oscillatory shear.","authors":"Roni Chatterjee, Monoj Adhikari, Smarajit Karmakar","doi":"10.1103/4bjr-74m6","DOIUrl":"https://doi.org/10.1103/4bjr-74m6","url":null,"abstract":"We investigate the effects of microalloying via random pinning on the yielding transition under oscillatory shear through extensive computer simulations. Random pinning refers to freezing the relaxation degrees of freedom for a fraction of randomly selected particles, which is often termed as hard pinning. Experimentally, pinning effects can be realized by introducing particles with much larger masses and diameters than the particles in the host medium, which is termed soft pinning. Many multicomponent glasses, especially metallic glasses, are good examples of such systems in which the mass and sizes of constituent molecules can vary considerably. Large molecules in these systems can act like soft pinning particles with respect to other particles due to a large timescale separation in their relaxation process. Using the Kob-Andersen model as our glass former, we create a randomly pinned system by pinning a fraction of the particles permanently, as well as by increasing their masses, thereby creating soft pinning sites. Increasing the fraction of hard or soft pinned particles transforms the system from a fragile to a strong glass former, enabling a systematic investigation of how fragility influences the yielding transition. Our findings reveal significant differences in the yielding behavior between strong and fragile glasses. These findings, along with earlier studies where fragility was tuned by varying the packing fraction in soft-sphere systems, demonstrate a universal relationship between fragility and yielding. Moreover, by varying the spatial dimensions, we demonstrate that the relationship is independent of both the dimensionality and the underlying origin of fragility in these model systems.","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"112 2-2","pages":"025427"},"PeriodicalIF":2.4,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145070441","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

Geometry and dynamics of spring networks of spherical topology. 球面拓扑弹簧网络的几何与动力学。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2025-08-01 DOI: 10.1103/d7r5-n7y1

Zhenwei Yao

引用次数: 0

Two-dimensional active Brownian particles crossing a parabolic barrier: Transition-path times, survival probability, and first-passage time. 穿越抛物势垒的二维活跃布朗粒子：过渡路径时间、生存概率和首次通过时间。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2025-08-01 DOI: 10.1103/pw94-4g1n

Michele Caraglio

引用次数: 0