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

Lattice Topological Defects in Non-Unitary Conformal Field Theories

This paper investigates topological defects in non-unitary conformal field theories by constructing impurity models and defect operators within restricted solid-on-solid lattice systems, where numerical computations of energy spectra and thermodynamic properties are validated against analytical predictions and used to analyze renormalization group flows.

Madhav Sinha, Thiago Silva Tavares, Hubert Saleur, Ananda Roy2026-04-30
🔢 mathematics

Algebraic quantum kinematics and SR-selection

This paper establishes the first part of a six-paper series presenting an operator-algebraic framework that derives special relativity from non-relativistic quantum mechanics by analyzing the photon sector of free QED, distinguishing the roles of constants cc and \hbar, and proposing the "SR-selection conjecture" which posits that the transition to a relativistic Haag-Kastler net is structurally obstructed in the Galilean case.

Leonardo A. Pachon2026-04-30
🔢 mathematics

Newton-Cartan limit of Klein-Gordon AQFT and the collapse of Galilean modular structure

This paper extends the known absence of Reeh-Schlieder and Tomita-Takesaki modular flow in Galilean algebraic quantum field theory to curved Newton-Cartan backgrounds by demonstrating that the cc \to \infty limit of the free Klein-Gordon field yields a Galilean net where the gravitational potential influences the Hamiltonian but fails to restore the modular structure obstructed by the Bargmann central charge.

Leonardo A. Pachon2026-04-30
⚛️ general relativity

Power-Law Approach of the Stress-Energy Tensor to the Unruh State after Gravitational Collapse

This paper establishes that the renormalized stress-energy tensor of a massless scalar field in a collapsing null-shell spacetime approaches the Unruh state with a non-zero ts3t_s^{-3} power-law tail at late times, a result driven by the ω2lnω\omega^2\ln\omega branch-point singularity in the radial wave equation's Wronskian and confirmed by both analytical bounds and numerical data.

Michael Wilson2026-04-30