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.

Instability thresholds for de Sitter and Minkowski spacetimes in holographic semiclassical gravity

This paper investigates the stability thresholds of de Sitter and Minkowski spacetimes in holographic semiclassical gravity across dimensions d=3,4,5d=3,4,5, revealing that stability depends critically on the spacetime dimension and a specific dimensionless parameter γd\gamma_d, with Minkowski spacetime being universally unstable in d=3d=3, both spacetimes becoming unstable in d=4d=4 beyond a critical threshold, and both remaining stable in d=5d=5 except where higher-curvature corrections dominate.

Akihiro Ishibashi, Kengo Maeda, Takashi Okamura2026-03-06🔬 physics

Dirac-Bergmann algorithm and canonical quantization of kk-essence cosmology

This paper develops a general canonical quantization scheme for kk-essence cosmology using the Dirac-Bergmann algorithm to derive a Wheeler-DeWitt equation, which is then applied to a tachyonic field model to investigate phantom crossing via quantum tunneling and the effects of boundary conditions on singularity avoidance and expansion rates.

Andrés Lueiza-Colipí, Andronikos Paliathanasis, Nikolaos Dimakis2026-03-06⚛️ quant-ph

On the (FibFib)S2(\text{Fib} \boxtimes \text{Fib}) \rtimes S_2 fusion category

This pedagogical paper calculates the essential ingredients, including irreducible representations, lasso maps, and a 22-by-22 modular S matrix, to enable a modular conformal bootstrap analysis of non-rational Virasoro CFTs with (FibFib)S2(\text{Fib} \boxtimes \text{Fib}) \rtimes S_2 categorical symmetry, while highlighting the unique features arising from non-invertible symmetries.

Maddalena Ferragatta, Balt C. van Rees2026-03-06🔬 physics

Generalized entropic uncertainty relation and non-classicality in Schwarzschild black hole

This study proposes a novel, tighter generalized entropic uncertainty relation for multi-measurements in many-body systems and applies it to Schwarzschild black holes to reveal the exact equivalence between entanglement and l1l_1-norm coherence in GHZ-type states, while demonstrating how increasing Hawking temperature degrades quantum coherence and maximizes measurement uncertainty.

Rui-Jie Yao, Dong Wang2026-03-06⚛️ quant-ph

Thermodynamic Gravity with Non-Extensive Horizon Entropy and Topological Calibration

This paper extends Jacobson's thermodynamic derivation of gravity to non-extensive horizon entropies by introducing a Topological Calibration Principle that links the effective gravitational coupling to the Euler characteristic of spacetime sections, thereby providing a framework to constrain non-extensive parameters and explore cosmological implications.

Marco Figliolia, Petr Jizba, Gaetano Lambiase2026-03-06🔭 astro-ph