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.

⚛️ high-energy theory

Complexity study of the Hartle-Hawking state in JT gravity

This paper investigates the growth of quantum complexity for the Hartle-Hawking state in Jackiw-Teitelboim gravity using the Wigner function negativity in the length basis, revealing that the state remains a minimum-uncertainty Gaussian with positive Wigner function at early times before saturating at late times, thereby demonstrating that the length basis provides an ideal semi-classical framework for describing chaotic quantum dynamics without exhibiting the spectral ramp seen in other measures.

Ritam Basu2026-10-02
⚛️ general relativity

Vacuum entanglement in a time-dependent electric field

This paper investigates how a time-dependent homogeneous electric field influences vacuum entanglement in a charged scalar field, revealing that while the field enhances total correlations and state mixedness via the Schwinger effect, it causes distillable entanglement between disjoint regions to decrease and eventually vanish, with correlation distributions acquiring a nontrivial directional dependence due to background anisotropy.

Álvaro Álvarez-Dom\'ınguez, Luis J. Garay, Mercedes Mart\'ın-Benito, Iker Sanz-González2026-10-02
⚛️ high-energy theory

On-shell renormalization of sine-Gordon by the quantum inverse scattering method

This paper proposes an on-shell renormalization scheme for the sine-Gordon model within the quantum inverse scattering method, where the entire cutoff dependence is absorbed into a length rescaling factor ZLZ_L without renormalizing the field or coupling, thereby directly yielding exact soliton and breather mass ratios that interpolate between classical and semiclassical limits while highlighting the interplay between integrability and renormalization.

Francesco Beccarini, Claudio Conti2026-10-02
⚛️ phenomenology

Near Threshold Kaluza-Klein Graviton Decays and the Dark Dimension

This paper demonstrates that near-threshold intra-tower decays of Kaluza-Klein gravitons follow a dd-wave (p5p^5) scaling rather than the previously assumed ss-wave (pp) behavior, which effectively rules out these gravitons as dark matter in a flat dark dimension and necessitates a significantly smaller extra-dimensional radius to satisfy cosmological constraints on gamma-ray backgrounds and reheating temperatures.

Kevin Langhoff2026-10-02