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.

A new way to unify all fermion and boson fields, including gravity

This paper proposes a unified framework in d=2(2n+1)d=2(2n+1) dimensions, utilizing superpositions of odd and even products of γa\gamma^a operators as basis vectors to describe all observed fermions and bosons (including gravity) as having non-zero angular momentum only in four-dimensional spacetime, while demonstrating an equality between the number of internal states for fermions and bosons and deriving their corresponding Lagrangian density.

N. S. Mankoč Borštnik2026-05-05⚛️ hep-th

Menagerie of Euclidean constructions for 3D holographic cosmologies

This paper generalizes the Antonini-Sasieta-Swingle construction of 3D holographic cosmologies by introducing a gluing procedure that adds arbitrary AdS tubes to heavy-particle wormhole solutions, enabling the creation of homogeneous and isotropic models while identifying conditions under which these cosmological saddles dominate the Euclidean path integral over alternative configurations.

Mark Van Raamsdonk, Alejandro Vilar López2026-05-05⚛️ gr-qc

Spherically symmetric black holes in Gravity from Entropy and spontaneous emission

This paper investigates static and dynamical spherically symmetric black holes within the Gravity from Entropy framework, demonstrating that the theory yields r4r^{-4} corrections to the Schwarzschild metric, aligns with current astrophysical observations, and predicts both a standard Hawking-like mass loss at intermediate scales and a constant background evaporation rate for large black holes due to inherent entropic leakage.

Udaykrishna Thattarampilly, Yunlong Zheng, Vishnu Kakkat2026-05-05⚛️ gr-qc

Which Coherence Decoheres? Basis-Dependent Decoherence Rates in Symmetry-Broken Collective Spin Systems

This paper demonstrates that in the ordered phase of a Z2\mathbb{Z}_2-symmetric collective spin system, the decoherence rate of localized pointer states exceeds that of energy eigenstates by a factor of up to 2.42 due to parity-induced suppression of cross-terms in the latter, a discrepancy that vanishes only in the thermodynamic limit where secular approximation fails.

Stavros Mouslopoulos2026-05-05⚛️ quant-ph

Universality of Quantum Gates in Particle and Symmetry Constrained Subspaces

This paper establishes the universality of hardware-efficient quantum gates for state preparation within particle and symmetry-constrained subspaces by leveraging Lie algebraic techniques and Pauli ZZ dressing to span the full so(w)\mathfrak{so}(w) or su(w)\mathfrak{su}(w) algebras, providing a verified framework for applications ranging from Hubbard models to conformal field theories.

Andreas Stergiou, Nicolas PD Sawaya2026-05-05⚛️ quant-ph