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.

⚛️ lattice

Multilevel Plaquette-Space Sampling for Lattice Gauge Theories with Local Constraint Solves

This paper introduces a multilevel normalizing-flow sampler that operates directly in plaquette space by employing a coarse-to-fine factorization to exactly satisfy local Bianchi constraints, thereby overcoming the learning challenges of long-range correlations in link-space models and significantly outperforming traditional methods, particularly in the weak-coupling regime.

Ankur Singha, Jacob Finkenrath, Karl Jansen, Vipul Arora, Shinichi Nakajima2026-09-29
🔢 mathematics

Non-equilibrium steady state of the symmetric exclusion process with reservoirs

This paper characterizes the non-equilibrium steady state of the open symmetric exclusion process on a connected graph with reservoirs as a convex combination of product Bernoulli measures, where the mixing weights are determined by the absorption probabilities of a dual stochastic process and explicitly computed for homogeneous segments.

Jhon Astoquillca, Simone Floreani, Adrián González Casanova2026-09-28
🔬 condensed matter

Disentangling the Toric Code

This paper demonstrates that while the non-on-site U(1)U(1) symmetries of commuting-projector Hamiltonians like the 1+1d Ising model and 2+1d toric code cannot be made on-site using finite-dimensional ancillae due to fractionalized excitations, they can be disentangled into on-site symmetries by employing infinite-dimensional ancillae, provided the resulting ancilla Hamiltonians are unbounded from below.

Lei Gioia, Salvatore D. Pace, Ruben Verresen, Shu-Heng Shao, Ryan Thorngren2026-09-28
🔢 mathematics

Potential Hessian Ascent IV: Sampling the Sherrington-Kirkpatrick model at β<1\beta < 1

This paper presents a polynomial-time algorithm that samples from the Gibbs measure of the Sherrington-Kirkpatrick model with vanishing error for any inverse temperature β<1\beta < 1 by combining algorithmic stochastic localization with Jarzynski's equality, leveraging local regularity properties of the TAP free energy to extend previous results that were limited to β<1/2\beta < 1/2.

Holden Lee, Juspreet Singh Sandhu, Jonathan Shi2026-09-28
🔢 mathematics

The para--Krawtchouk oscillator and its continuum limit

This paper investigates the continuum limit of the para-Krawtchouk oscillator, demonstrating that its discrete Hamiltonian converges to a singular (isotonic) oscillator with a specific inverse-square potential, while its eigenvectors and algebraic structure transition to generalized Hermite functions and the su(1,1)\mathfrak{su}(1,1) dynamical algebra, respectively.

Stéphane Z. Beaulac, Nicolas Crampé, Quentin Labriet, Lucia Morey, Marlon Josue Rivera Valladares, Luc Vinet2026-09-28
🔢 mathematics

The para--Racah Hamiltonian as an exactly solvable discretization of the Pöschl--Teller box

This paper demonstrates that the para-Racah Hamiltonian, a mirror-symmetric tridiagonal matrix with a quadratic bi-lattice spectrum, serves as an exactly solvable discretization of the Pöschl-Teller Hamiltonian, with the discrete model's recurrence relations, polynomial structures, and Racah algebra symmetry converging to their continuous trigonometric counterparts and Jacobi algebra as the number of sites increases.

Stéphane Z. Beaulac, Nicolas Crampé, Quentin Labriet, Lucia Morey, Marlon Josue Rivera Valladares, Luc Vinet2026-09-28