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.

Spectral Structure of the Mixed Hessian of the Dispersionless Toda τ\tau-Function

This paper demonstrates that for the ss-fold symmetric one-harmonic polynomial conformal map, the first spectral instability of the mixed Hessian of the dispersionless Toda τ\tau-function occurs at the analytic threshold ζc\zeta_c rather than the later geometric threshold ζuniv\zeta_{\mathrm{univ}} where univalence is lost, characterized by a single logarithmically diverging eigenvalue and a bounded remainder spectrum.

Oleg Alekseev2026-03-25🔢 math-ph

On the issues arising when defining an X gate for qudits: Extending the Bit-Flip Channel to dd-dimensional systems

This paper addresses the ambiguity in defining X gates for qudits by identifying three inequivalent formulations of the bit-flip channel, demonstrating that common cyclic models are special cases of these generalizations, and showing how these distinct channels uniquely impact the entanglement of qubit-qutrit and 2-qutrit Werner states.

Jean F. Gomez, Hermann L. Albrecht2026-03-24🔢 math-ph

Homomorphism, substructure, and ideal: Elementary but rigorous aspects of renormalization group or hierarchical structure of topological orders

This paper proposes a rigorous quantum Hamiltonian formalism for renormalization group flows in topologically ordered systems by leveraging the algebraic relationship between homomorphisms, quotient rings, and ideals to characterize generalized symmetries, determine anyon condensation rules, and constrain gapped phase classifications.

Yoshiki Fukusumi, Yuma Furuta2026-03-24⚛️ hep-th

A Thermodynamically Consistent Free Boundary Model for Two-Phase Flows in an Evolving Domain with Bulk-Surface Interaction

This paper derives a thermodynamically consistent free boundary model for two-phase flows in an evolving domain that incorporates bulk-surface interactions via convective Cahn--Hilliard equations and generalized Navier slip conditions, unifying previous models through rigorous derivation via Lagrange Multiplier and Energetic Variational approaches.

Patrik Knopf, Yadong Liu2026-03-24🔢 math-ph