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.

⚛️ high-energy theory

A general proof of integer Rényi QNEC

This paper proves the Rényi quantum null energy condition for all integer parameters n2n \geq 2 in local Poincaré-invariant quantum field theories by establishing the log-convexity of Kosaki LnL^n norms under null-translation semigroups for von Neumann algebras with half-sided modular inclusion structures, requiring only the finiteness of the sandwiched Rényi divergence for the excited state.

Tanay Kibe, Pratik Roy2026-05-18
🔢 mathematics

Spectral separation of variables from equivalent Lagrangian systems

This paper demonstrates that requiring two quadratic Lagrangians to generate identical Euler-Lagrange equations imposes a commutation condition between their kinetic matrices and the potential's Hessian, which enables an orthogonal spectral decomposition of the configuration space to decouple the equations of motion into independent subsystems, thereby recovering classical integrable regimes in systems like Sawada-Kotera and Hénon-Heiles.

Mattia Scomparin2026-05-18