Statistical mechanics explores how the chaotic motion of countless tiny particles gives rise to the predictable laws governing heat, pressure, and phase transitions. This field bridges the gap between the microscopic world of atoms and the macroscopic reality we experience daily, offering deep insights into why materials behave the way they do.

On Gist.Science, we process every new preprint in this category as it appears on arXiv to make these complex findings accessible to everyone. For each paper, we provide both a plain-language explanation for the curious reader and a detailed technical summary for specialists, ensuring that groundbreaking research is never lost behind a wall of jargon.

Below are the latest papers in statistical mechanics, freshly curated and summarized to help you understand the cutting edge of this fascinating discipline.

From bulk to interface dynamics, in and out of equilibrium

This paper derives the linear relaxation and fluctuation dynamics of weakly deformed interfaces separating stable phases using fluctuating hydrodynamics and the dynamical-action formalism, extending results from equilibrium to non-equilibrium systems like active model A while cautioning against the uncontrolled application of popular equilibrium ansätze to active field theories.

Lila Sarfati, Julien Tailleur, Frédéric van Wijland2026-05-19🔬 cond-mat

Global space correlations of polarization, charge density, and electric field in electrolytes under the fixed-potential condition

This paper investigates the thermal fluctuations and global space correlations of polarization, charge density, and electric field in dilute electrolytes between fixed-potential metallic electrodes, revealing that the nature of these correlations and the effective dielectric constant depend critically on whether the film thickness is smaller or larger than the Debye screening length.

Akira Onuki2026-05-19🔬 cond-mat

Exact solution and pair correlation functions for a generalized three-chain Ising tube with multispin interactions

This paper presents an exact solution for a generalized three-chain Ising tube with the most general C3C_3-invariant Hamiltonian containing 20 coupling constants, deriving the partition function and thermodynamic properties via an 8×88\times 8 transfer matrix while analyzing specific cases where the characteristic polynomial simplifies and providing explicit formulas for pair correlation functions and magnetization.

Pavel Khrapov, Nikita Volkov2026-05-19🔬 cond-mat

Mpemba effect in a sheared granular gas with velocity-dependent restitution

Using kinetic theory, this study demonstrates that a dilute sheared granular gas with a velocity-dependent restitution coefficient exhibits both temperature and viscosity Mpemba effects, where systems with higher initial temperatures relax faster than cooler ones, with the velocity dependence introducing an intrinsic timescale that enables multiple relaxation curve crossings.

Makoto R. Kikuchi, Yuria Kobayashi, Satoshi Takada2026-05-19🔬 cond-mat

Entropy additivity from exponential decay of correlations: a coarse-grained operator approach

This paper provides a constructive derivation of thermodynamic extensivity by demonstrating that coarse-grained entropy becomes additive in the thermodynamic limit for systems with short-range interactions, provided the pair potential satisfies stability, temperedness, and exponential decay of correlations, while quantifying non-additivity and surface corrections for systems with long-range forces.

Bob Osano2026-05-19🔬 cond-mat