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.

One-Loop Quantum Corrections to the Casimir Effect for Rough Plates in the Low-Temperature Regime

This paper derives analytical expressions for the one-loop quantum corrections to the Casimir effect and topological mass generation for a self-interacting real scalar field between rough parallel plates at low temperatures, utilizing WKB methods and ζ\zeta-function regularization to account for both geometric perturbations and finite thermal effects.

Claudio Bórquez, Byron Droguett2026-04-17⚛️ hep-th

Emergent States and Algebras from the Double-Scaling limit of Pure States in SYK

This paper demonstrates that in the double-scaling limit of the SYK model, the emergent algebraic description of Kourkoulou-Maldacena pure states transitions from a mixed Type II1_1 factor to a pure Type I_\infty algebra when augmented with state-adapted dressed operators, thereby restoring access to the underlying microscopic purity and providing a concrete framework for understanding black hole interiors and closed universes.

Harshit Rajgadia, Jiuci Xu2026-04-17⚛️ hep-th

Spatially covariant gravity with two degrees of freedom: A perturbative analysis up to cubic order

This paper employs a perturbative analysis of polynomial-type spatially covariant gravity Lagrangians up to cubic order around a cosmological background to derive specific coefficient conditions that eliminate the scalar mode, thereby identifying five explicit models that propagate only the two tensorial degrees of freedom characteristic of general relativity.

Yang Yu, Yu-Min Hu, Xian Gao2026-04-17⚛️ gr-qc

Fermionic modes of D-instanton wormholes from broken local supersymmetry

This paper demonstrates that in the low-energy supergravity treatment of type IIB string theory on D-instanton wormhole profiles, the modes of broken local supersymmetry in the bulk generate non-vanishing fermionic diagonal modes on the boundaries via current-current two-point functions, extending these results to multi D-instanton and general Euclidean brane scenarios.

H. Itoyama, Hikaru Kawai, Shoichi Kawamoto2026-04-17⚛️ hep-th