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.

PGL(3)\mathrm{PGL}(3)-invariant integrable systems from factorisation of linear differential and difference operators

This paper presents a unified framework for constructing continuous and discrete PGL(3)\mathrm{PGL}(3)-invariant integrable systems by generalizing the Schwarzian derivative and cross-ratio through the factorization of third-order linear spectral problems, thereby establishing dualities, exact discretizations, and a generating Lagrangian structure for the Boussinesq hierarchy.

Frank Nijhoff, Linyu Peng, Cheng Zhang, Da-jun Zhang2026-03-20🌀 nlin

Radiation damping of the soliton internal mode in 1D quadratic Klein-Gordon equation

This paper demonstrates that on a codimension-one manifold of fine-tuned initial data, the internal mode of a soliton in the 1D quadratic Klein-Gordon equation undergoes slow, irreversible decay into dispersive radiation due to radiation damping, a process accurately described by a cubic resonant approximation with a damping rate governed by a Fermi golden rule-type coefficient.

Piotr Bizoń, Tomasz Romańczukiewicz2026-03-20🔢 math-ph

Well-posedness for the ˉ\bar\partial-problem relevant to the AKNS spectral problem

This paper establishes the well-posedness of the ˉ\bar\partial-problem associated with the AKNS spectral system by developing a decomposition technique to prove the existence and uniqueness of solutions under small norm conditions, while extending the Dbar dressing method to construct potentials and demonstrating the Lipschitz continuity of the map from Dbar data to the potential.

Junyi Zhu, Huan Liu2026-03-20🔢 math-ph

A stable and fast method for solving multibody scattering problems via the method of fundamental solutions

This paper presents a stable and efficient numerical method for solving acoustic multibody scattering problems in two and three dimensions by combining local Method of Fundamental Solutions (MFS) approximations with a global iterative solver, achieving high accuracy and scalability without the implementation complexity of traditional boundary integral discretization techniques.

Yunhui Cai, Joar Bagge, Per-Gunnar Martinsson2026-03-20🔢 math-ph