Mathematical physics sits at the fascinating intersection where abstract equations meet the fundamental laws of our universe. This field uses rigorous mathematical tools to model everything from the behavior of subatomic particles to the curvature of spacetime, turning complex theories into testable predictions. It is the language through which physicists describe reality, bridging the gap between pure mathematics and physical observation.

On Gist.Science, we process every new preprint published in this category on arXiv to make these dense studies accessible to everyone. Whether you are a specialist or a curious reader, you will find both plain-language overviews and detailed technical summaries for each paper. Below are the latest mathematical physics papers from arXiv, curated to help you explore the cutting edge of theoretical science.

🔢 mathematics

Convergence of the Cumulant Expansion and Polynomial-Time Algorithm for Weakly Interacting Fermions

This paper presents a mathematically rigorous, randomized polynomial-time algorithm for computing the log-partition function of weakly interacting fermions by extending cumulant expansion convergence proofs to non-periodic systems and utilizing a tree-determinant expansion with importance sampling and belief propagation.

Hongrui Chen, Cambyse Rouzé, Jielun Chen, Jiaqing Jiang, Samuel O. Scalet, Yongtao Zhan, Garnet Kin-Lic Chan, Lexing Yin (…)2026-09-25
🔢 mathematics

Uniform displacement bounds and Gibbs limits for periodic one-dimensional Riesz gases

This paper establishes uniform particle-displacement variance bounds and exponential tails for neutral periodic one-dimensional Riesz gases with locally attractive potentials, demonstrating that their stationary thermodynamic limits are simple, ordered, and satisfy canonical Gibbs equations while exhibiting bounded interval number variance and positive limiting second moments at low temperatures.

Yan Ru Pei2026-09-25
🌀 nonlinear sciences

Conditional preservation of chimera states under equitable network coarse-graining

This paper demonstrates that while equitable-partition-based quotient graphs provide structurally exact dynamics for cluster-synchronous states, they do not automatically preserve chimera patterns in the full network, as the transverse stability of the quotient trajectory is a critical and distinct requirement for dynamical preservation.

Margherita Bertè, Thierry Njougouo, Paolo Sarti, Tommaso Gili2026-09-25