cond-mat.stat-mech papers

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.

🔭 astrophysics

In-depth analysis of bar formation mechanisms of disk galaxies in halos of different concentrations

Using N-body simulations, this study reveals that bar formation mechanisms in disk galaxies vary significantly with halo concentration: highly concentrated halos favor swing-amplified multi-arm modes followed by particle trapping with minimal angular momentum transfer, lowly concentrated halos are dominated by linearly unstable modes triggering strong corotation resonance and rapid slowdown, while intermediate concentrations exhibit a combination of all these processes.

T. Worrakitpoonpon2026-01-27

🔬 condensed matter

Separating Energy and Entropy Contributions to the Hexatic-Liquid Transitions in Two-Dimensional Repulsive Systems

By decomposing the Helmholtz free energy across three repulsive systems, this study reveals that the nature of two-dimensional hexatic-liquid transitions is universally determined by a competition between the convex energetic contribution and the concave entropic contribution, where the dominance of the latter drives first-order transitions while its absence leads to continuous ones.

Yan-Wei Li, Rui Ding, Wen-Hao Ma2026-01-27

🔬 condensed matter

Scheme to Detect the Strong-to-weak Symmetry Breaking via Randomized Measurements

This paper proposes a practical experimental protocol using randomized measurements to detect strong-to-weak symmetry breaking in mixed quantum states by estimating Rényi-2 correlators, thereby enabling the study of novel quantum phases without requiring multi-replica setups.

Ning Sun, Pengfei Zhang, Lei Feng2026-01-26

🔬 condensed matter

Combinatorial Design of Floppy Modes and Frustrated Loops in Metamaterials

This paper introduces a combinatorial design approach to create arbitrarily large numbers of floppy modes and frustrated loops in metamaterials, demonstrating their application in mechanical computing tasks like matrix-vector multiplication through sequential elastoplastic buckling.

Wenfeng Liu, Tomer A. Sigalov, Corentin Coulais, Yair Shokef2026-01-26

🔬 condensed matter

Bubble formation in active binary mixture model

This paper introduces an active binary mixture model to demonstrate that activity asymmetry between solutes and solvents serves as a key control parameter for tuning bubble formation in active phase separation, revealing that moderate solvent activity enhances bubbles while equal activities suppress them and allow for the estimation of critical exponents.

Kyosuke Adachi2026-01-26

⚛️ quantum physics

Optimal detection of quantum states via projective measurements

This paper derives exact analytical expressions for the mean first detection time and the full probability distribution of detecting an extended subspace in a fully-connected quantum system evolving under random projective measurements, validating these results through exact enumeration.

Giuseppe Del Vecchio Del Vecchio, Satya N. Majumdar2026-01-26

🔬 condensed matter

Gauge invariance and hyperforce correlation theory for equilibrium fluid mixtures

This paper establishes a gauge invariance framework for equilibrium statistical mechanics of classical multi-component systems, deriving exact sum rules that link species-resolved hyperforce correlation functions to spatial derivatives of pair distribution functions and validating the theory through simulations of binary Lennard-Jones mixtures.

Joshua Matthes, Silas Robitschko, Johanna Müller, Sophie Hermann, Florian Sammüller, Matthias Schmidt2026-01-26

🔬 condensed matter

Fluctuation-Response Theory for Nonequilibrium Langevin Dynamics

This paper establishes a unified fluctuation-response framework for nonequilibrium Langevin dynamics that generalizes the fluctuation-dissipation theorem and derives practical response uncertainty relations, which are demonstrated to constrain the diffusion coefficient in the $F_1$ -ATPase molecular motor model.

Hyun-Myung Chun, Euijoon Kwon, Hyunggyu Park, Jae Sung Lee2026-01-26

⚛️ quantum physics

Gluing Randomness via Entanglement: Tight Bound from Second Rényi Entropy

This paper establishes that entanglement serves as the fundamental resource for generating global random quantum states via local operations, demonstrating that the quality of the resulting approximate state designs is tightly bounded by the second Rényi entanglement entropy of the initial state, which thus defines the maximal capacity for randomness generation under resource-free constraints.

Wonjun Lee, Hyukjoon Kwon, Gil Young Cho2026-01-26

⚛️ quantum physics

Experimental verification of the area law of mutual information in a quantum field simulator

This study experimentally verifies the area law of quantum mutual information in gapped one-dimensional quantum field theories using an ultra-cold atom simulator, overcoming the challenges of measuring von Neumann entropy in spatially extended subsystems.

Mohammadamin Tajik, Ivan Kukuljan, Spyros Sotiriadis, Bernhard Rauer, Thomas Schweigler, Federica Cataldini, João Sabino (…)2026-01-23

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