From Symmetry to Fluctuations: Topics and Advances in Statistical Mechanics and Probability Theory

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Physics".

Deadline for manuscript submissions: 30 October 2025 | Viewed by 617

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Departamento de Física, Universidad Católica del Norte, Av. Angamos 0610, Antofagasta, Chile
Interests: systems out of equilibrium; nonlinear phenomena; complex systems; Monte Carlo simulation
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Special Issue Information

Dear Colleagues,

This Special Issue aims to consolidate leading developments at the interface of statistical mechanics and probability theory, unified under the central theme of symmetry and fluctuation. These two foundational concepts play a pivotal role in our understanding of complex systems, ranging from microscopic particle ensembles to macroscopic emergent behavior, and they continue to inspire rich mathematical structures and physical insights. The issue will highlight how symmetry principles, such as invariance under transformations, conservation laws, and group actions, shape the behavior of stochastic systems and determine equilibrium and dynamical properties. Equally central are typical and rare fluctuations, which encode the probabilistic structure of these systems and offer a powerful lens for understanding phenomena far from equilibrium.

We invite you to contribute to reflecting on the fluctuation to symmetry interplay in statistical mechanics and probability theory, from rigorous theoretical analysis to innovative applications, including but not limited to the following:

  • Symmetry and invariance in probabilistic and statistical mechanical models;
  • Spontaneous symmetry breaking and emergent phenomena in phase transitions;
  • Fluctuation theorems and non-equilibrium thermodynamics;
  • Large deviation theory, concentration inequalities, and stochastic stability;
  • Interacting particle systems, random fields, and spin models;
  • Markov processes, stochastic dynamics, and ergodic behavior;
  • Random matrix theory and applications in complex systems;
  • Dynamical processes in maximum caliber principles;
  • Quantum statistical mechanics and entropic principles;
  • Applications in data science, machine learning, and inference via statistical mechanics.

Dr. Sergio Curilef
Guest Editor

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Symmetry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • symmetry and invariance in probabilistic and statistical mechanical models
  • spontaneous symmetry breaking and emergent phenomena in phase transitions
  • fluctuation theorems and non-equilibrium thermodynamics
  • large deviation theory, concentration inequalities, and stochastic stability
  • interacting particle systems, random fields, and spin models
  • markov processes, stochastic dynamics, and ergodic behavior
  • random matrix theory and applications in complex systems
  • dynamical processes in maximum caliber principles
  • quantum statistical mechanics and entropic principles
  • applications in data science, machine learning, and inference via statistical mechanics

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Published Papers (1 paper)

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Research

18 pages, 319 KB  
Article
Integrable Multispecies Totally Asymmetric Stochastic Interacting Particle Systems with Homogeneous Rates
by Eunghyun Lee and Temirlan Raimbekov
Symmetry 2025, 17(9), 1510; https://doi.org/10.3390/sym17091510 - 11 Sep 2025
Viewed by 289
Abstract
We study one-dimensional stochastic particle systems with exclusion interaction—each site can be occupied by at most one particle—and homogeneous jumping rates. Earlier work of Alimohammadi and Ahmadi classified 28 Yang–Baxter integrable two-particle interaction rules for two-species models with homogeneous rates. In this work, [...] Read more.
We study one-dimensional stochastic particle systems with exclusion interaction—each site can be occupied by at most one particle—and homogeneous jumping rates. Earlier work of Alimohammadi and Ahmadi classified 28 Yang–Baxter integrable two-particle interaction rules for two-species models with homogeneous rates. In this work, we show that 7 of these 28 cases can be naturally extended to integrable models with an arbitrary number of species N2. A key novelty of our approach is the discovery of new integrable families with one or two continuous parameters that generalize these seven cases, significantly broadening the known class of multispecies integrable exclusion processes. Furthermore, for 8 of the remaining 21 cases, we propose an alternative extension scheme that also yields integrable N-species models, thereby opening new directions for constructing and classifying integrable particle systems. Full article
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