Hep-Th, or high-energy theoretical physics, explores the fundamental building blocks of our universe and the forces that govern them. Researchers in this field use complex mathematics to understand everything from subatomic particles to the behavior of black holes, often pushing the boundaries of what we know about space and time.

At Gist.Science, we monitor the arXiv repository to ensure you stay ahead of the curve in this rapidly evolving discipline. For every new preprint uploaded to arXiv under this category, our team generates both accessible plain-language overviews and detailed technical summaries, making cutting-edge research understandable regardless of your background.

Below are the latest papers in high-energy theoretical physics, curated to help you navigate the most significant recent discoveries.

Heat kernel approach to the one-loop effective action for nonlinear electrodynamics

This paper develops a heat kernel method to compute the one-loop effective action for general nonlinear electrodynamics theories in four-dimensional Minkowski spacetime, specifically addressing the challenges of non-minimal differential operators by calculating the DeWitt coefficients in the weak-field regime and analyzing causality conditions for conformal theories.

Evgeny I. Buchbinder, Darren T. Grasso, Joshua R. Pinelli2026-04-10⚛️ hep-th

Area Scaling of Dynamical Degrees of Freedom in Regularised Scalar Field Theory

Using symplectic model order reduction, this paper demonstrates that the minimal number of canonical degrees of freedom required to describe the Hamiltonian evolution of a regularised scalar field scales with the area of the region rather than its volume, a phenomenon driven by the count of distinct normal-mode frequencies and observed in both flat and curved spacetimes as well as weakly interacting theories.

Oliver Friedrich, Kristina Giesel, Varun Kushwaha2026-04-10⚛️ hep-ph

Electromagnetic wave propagation in static black hole spacetimes: an effective refractive index description in Schwarzschild geometry

This paper presents a fully covariant and gauge-invariant formulation of electromagnetic wave propagation in static black hole spacetimes that reduces both axial and polar sectors to a unified master equation, enabling the derivation of a closed-form, position- and frequency-dependent effective refractive index in Schwarzschild geometry to provide an intuitive optical framework for analyzing gravitational effects on wave dynamics.

Abdullah Guvendi, Omar Mustafa Semra Gurtas Dogan, Hassan Hassanabadi2026-04-10⚛️ gr-qc