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.

System driven out-of equilibrium by weak contacts with reservoirs

This paper investigates how dimension and contact geometry influence non-equilibrium behavior in particle systems driven by reservoirs, demonstrating that while symmetric simple exclusion processes in dimensions one and two exhibit three distinct coupling regimes, dimensions three and higher display only a weak coupling regime sensitive to microscopic contact structures, whereas mesoscopic contacts preserve macroscopic fluctuation theory and allow for an extended additivity principle.

Thierry Bodineau, Bernard Derrida2026-05-05🔬 cond-mat

Mobility Anisotropy Reshapes Self-Propelled Motion

This paper presents an exact solution for the nonequilibrium dynamics of a harmonically trapped self-propelled particle with anisotropic mobility, revealing that high persistence leads to a strictly sub-Gaussian steady-state distribution where the particle is displaced into high-potential regions, characterized by negative excess kurtosis and a distinct quasi-steady plateau in its mean squared displacement.

Amir Shee, P. S. Pal2026-05-05🔬 cond-mat

Stochastic first-passage modeling of single-event burnout in SiC power MOSFETs

This paper introduces a stochastic first-passage modeling framework that explains how electrothermal fluctuations in SiC power MOSFETs transform the deterministic single-event burnout threshold into a probabilistic transition band, revealing noise-induced subthreshold failures and providing a statistical-physics interpretation of threshold dispersion.

Feiyi Liu, Min Guo, Shiyang Chen, Yuhan Jiang, Mingyang Liu, Yang Wang2026-05-05🔬 physics.app-ph

Duality between dissipation-coherence trade-off and thermodynamic speed limit based on thermodynamic uncertainty relation for stochastic limit cycles

This paper establishes a fundamental duality between the dissipation-coherence trade-off and the thermodynamic speed limit for stochastic limit cycles in the weak-noise limit by deriving both bounds from the thermodynamic uncertainty relation using mutually dual observables, and validates these results through numerical simulations of the Rössler model and applications to stochastic chemical systems.

Ryuna Nagayama, Sosuke Ito2026-05-04🔬 cond-mat