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.

🔬 condensed matter

Heterogeneous planar diffusion with axisymmetric power-law decaying diffusion coefficient under stochastic resetting

This paper analytically investigates two-dimensional heterogeneous diffusion with a radially decaying coefficient under stochastic resetting, deriving exact probability densities, stationary states, and first-passage properties for various noise interpretations and memory effects, while demonstrating how these factors influence mean squared displacement saturation and the existence of an optimal resetting rate.

Trifce Sandev, Sebastien Fumeron, Malte Henkel, Ervin K. Lenzif2026-09-22
🔬 condensed matter

Non-equilibrium dynamics of drift-diffusion process under threshold resetting

This paper investigates the emergence of non-equilibrium steady states in stochastic processes under threshold resetting, deriving a general condition linking the steady-state distribution to the ratio of mean local time and mean first-passage time, and demonstrating through a one-dimensional drift-diffusion model that this protocol induces rich intermediate-time dynamics such as anomalous relaxation and damped oscillations.

Rahul Das, Satya N Majumdar, Arnab Pal2026-09-22
🔬 condensed matter

Navier-Stokes hydrodynamics near the critical point with out-of-equilibrium modes

This paper investigates how slow out-of-equilibrium modes reshape the power spectrum of dynamical density fluctuations near the critical point, revealing that these modes introduce an extensivity constraint on velocity coupling and significantly reduce fluctuation decay rates, thereby manifesting the characteristic slowing down of the system.

Md Hasanujjaman, Golam Sarwar, Mahfuzur Rahaman, Abhijit Bhattacharyya, Jane Alam2026-09-22
🔬 mesoscale physics

Quantum non-Markovian Hatano-Nelson model

This paper demonstrates how a quantum non-Markovian Hatano-Nelson model with frequency-dependent nonreciprocal hopping and dissipation arises microscopically in quasi-one-dimensional dissipative lattices using non-equilibrium Green's functions, revealing unique non-Markovian phenomena like unidirectional frequency blocking and specific dissipative phase transitions that cannot be captured by Markovian or reciprocal theories.

Sumit Kumar Jana, Ryo Hanai, Tan Van Vu, Hisao Hayakawa, Archak Purkayastha2026-09-21
📊 statistics

Boltzmann generators for amorphous particle systems

This paper introduces a novel Boltzmann generator framework tailored for amorphous particle systems by embedding physical symmetries and periodic boundary conditions into Riemannian stochastic interpolants, which significantly improves sampling accuracy but ultimately reveals that accumulated numerical errors in continuous-flow formulations compromise the exact thermodynamic reweighting required for equilibrium sampling.

Louis Grenioux, Leonardo Galliano, Ludovic Berthier, Giulio Biroli, Marylou Gabrié2026-09-21