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

Entanglement and apparent thermality in simulated black holes

Using a chiral spin-chain simulator, the study demonstrates that while free quantum black hole models exhibit no genuine thermalization, Hawking radiation appears thermal only when observed through horizon bipartitions due to an apparent Fermi-Dirac distribution, with true thermal behavior emerging solely from interactions deep within the black hole interior.

Iason A. Sofos, Andrew Hallam, Jiannis K. Pachos2026-03-16
🔢 mathematics

Hessian in the spinfoam models with cosmological constant

This paper introduces a general method based on the transverse intersection of submanifolds in phase space to prove the non-degeneracy of the Hessian in spinfoam vertex amplitudes with a cosmological constant, thereby validating the stationary phase approximation for non-degenerate geometric 4-simplices in de Sitter or anti-de Sitter space and confirming the model's connection to semiclassical gravity without dominant exceptional contributions.

Wojciech Kamiński, Qiaoyin Pan2026-03-16
⚛️ high-energy theory

Quasi-Dirac fermion: A source of neutrino mass and dark matter

This paper proposes that TeV-scale quasi-Dirac fermions, arising from lepton-symmetry violations in unified theories, simultaneously generate small radiative neutrino masses and provide a stable dark matter candidate, with their tiny mass splitting ensuring consistency with experimental constraints on dark matter detection and charged lepton flavor violation.

Nguyen Thi Nguyet Nga, Nguyen Huy Thao, Phung Van Dong2026-03-16
⚛️ high-energy theory

Two point functions and quantum fields in the anti-de Sitter universe

This paper constructs a manifestly covariant, coordinate-free plane-wave representation for scalar two-point functions in dd-dimensional anti-de Sitter spacetime using globally defined holomorphic plane waves, yielding integral representations that reproduce standard Legendre function solutions and clarify the relationship between Euclidean and Lorentzian AdS quantum field theories through a Kallen-Lehmann diagonalization in Poincaré coordinates.

Ugo Moschella2026-03-16
⚛️ high-energy theory

Simulating first-order phase transition during inflation

This paper proposes and validates via lattice simulations a novel Grand Unified Theory-scale first-order phase transition within Starobinsky inflation, featuring a dynamically evolving potential barrier that suppresses early bubble nucleation while triggering massive nucleation at the end of inflation to successfully resolve the graceful exit problem and produce a distinctive gravitational-wave spectrum.

Jintao Zou, Ligong Bian, Shao-Jiang Wang2026-03-16
⚛️ general relativity

Dynamical Tidal response of compact stars -- An EFT approach

This paper employs a point particle Effective Field Theory (EFT) approach, matched with Black Hole Perturbation Theory results calculated via the Mano-Suzuki-Takasugi method, to systematically derive Next-to-Next-to Leading Order dynamical tidal Love numbers and their Renormalization Group equations for non-viscous neutron stars, including those admixed with bosonic or fermionic dark matter.

Gregory Jarequi, Soumodeep Mitra, Varun Vaidya2026-03-16