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.

⚛️ phenomenology

Local gauge invariant operator on isometry breaking background

This paper proposes constructing local gauge invariant operators on isometry-breaking backgrounds via the Stückelberg mechanism—effectively introducing physical clocks and rods—but argues that suppressing the resulting spacetime fluctuations to reliably define operators in localized regions (such as black hole islands) requires strong isometry breaking, potentially achieved through transitions to higher-dimensional black holes.

Min-Seok Seo2026-03-05
🔬 physics

Holographic shear correlators at low temperatures, and quantum η/sη/s

This paper investigates holographic shear correlators in a strongly-coupled 3D theory at low temperatures, demonstrating that quantum-gravitational corrections from nearly-gapless Schwarzian modes increase shear viscosity and cause the η/s\eta/s ratio to dip below the semiclassical 1/4π1/4\pi bound at intermediate temperatures before diverging at very low temperatures.

Alexandros Kanargias, Elias Kiritsis, Sameer Murthy, Olga Papadoulaki, Achilleas P. Porfyriadis2026-03-05
🔬 physics

A Menagerie of Wormholes and Cosmologies in the Gravitational Path Integral

This paper investigates a diverse spectrum of Euclidean gravitational saddles, including wormholes and oscillatory solutions, within Einstein-Scalar-Maxwell models to identify phase transitions, demonstrate how potential flat directions are stabilized, and estimate the probabilities of various cosmological outcomes by analytically continuing these backgrounds to Lorentzian FLRW universes.

Panos Betzios, Paul Ghiringhelli, Ioannis D. Gialamas, Olga Papadoulaki2026-03-05