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.

Extended thermodynamics and PvP-v Criticality of Kalb-Ramond black hole coupled with nonlinear electrodynamics

This paper presents an exact anti-de Sitter black hole solution coupled with a Kalb-Ramond field and nonlinear electrodynamics, analyzing its horizon structure and demonstrating that Lorentz-violating parameters and nonlinear electrodynamics induce rich thermodynamic behaviors, including nonmonotonic temperature profiles, deviations from the area law, and first-order phase transitions.

D. V. Singh, S. Upadhyay, P. Paul, K. Myrzakulov2026-05-08⚛️ gr-qc

Krylov Dynamics and Operator Growth in Time-Dependent Systems via Lie Algebras

This paper establishes a unified framework linking time-dependent quantum dynamics in Krylov space to underlying Lie-algebraic structures, demonstrating that exact evolution is governed by ladder operators of embedded subalgebras like sl(2,C)\mathfrak{sl}(2,\mathbb{C}) and introducing a new quantum speed limit for complexity growth that saturates only when the Hamiltonian commutes with itself at different times.

András Grabarits, E. Medina-Guerra, Adolfo del Campo2026-05-08⚛️ quant-ph

Perturbative, Nonperturbative and Exact Aspects of Crystalline Phases in the Gross-Neveu Model

This paper provides a comprehensive, multi-method analysis (perturbative, semiclassical large-NN, and integrability) of the O(2N)O(2N) Gross-Neveu model, demonstrating that at large chemical potential, the system enters a consistent crystalline phase characterized by the condensation of bound states and the emergence of two new dynamically generated scales that govern nonperturbative effects and the oscillatory chiral condensate.

Francesco Benini, Ohad Mamroud, Tomas Reis, Marco Serone2026-05-08⚛️ hep-th

On the equivalence of unitarization prescriptions for the Sommerfeld enhancement

This paper demonstrates that various unitarization prescriptions for the Sommerfeld enhancement in self-interacting dark matter are effectively equivalent and regulator-independent, leading to a unified, regulator-free formula for multi-state systems expressed in terms of the standard enhancement factor, the hard annihilation amplitude, and the scattering SS-matrix.

Barry E. Cimring, Tracy R. Slatyer2026-05-08⚛️ hep-ph

Constraints on the inflationary vacuum and reheating era from NANOGrav

Using the 15-year NANOGrav data, this work constrains inflationary parameters and the reheating phase, finds a preference for a blue-tilted tensor spectrum and a radiation-like reheating phase, simultaneously demonstrates that observations favor a specific non-Bunch-Davies alpha-vacuum, and suggests that frequency-dependent modifications of this vacuum could resolve the blue-tilt problem.

Debtosh Chowdhury, Rounak Nath, Sudipta Show2026-05-08🔭 astro-ph

Canonical quantization of all minisuperspaces with consistent symmetry reductions

This paper presents a canonical quantization framework for all minisuperspaces derived from symmetry reductions of the Einstein-Hilbert Lagrangian that satisfy the principle of symmetric criticality, covering a wide range of cosmological and black hole geometries, and solves the resulting Wheeler-DeWitt equation both with and without the imposition of derived conformal symmetries.

Poula Tadros, Ivan Koář, Otakar Svítek2026-05-08⚛️ gr-qc

Carroll fermions from null reduction: A case of good and bad fermions

This paper derives both electric and magnetic Carrollian fermion actions from a single Bargmann-invariant Dirac action via null reduction, demonstrating how the decomposition of Dirac spinors into dynamical ("good") and constrained ("bad") light-cone modes in the parent theory naturally yields the respective magnetic and electric sectors upon deformation to Carroll spacetime.

Sucheta Majumdar, Aditya Sharma, Sourav Singha2026-05-08⚛️ hep-th

Small Vacuum Energy and Tunneling in a Modified Bousso-Polchinski Model

This paper proposes a modified Bousso-Polchinski model for string theory flux vacua that, when applied to the Schöller-Skarke database of Calabi-Yau fourfolds, demonstrates that the vast majority of configurations naturally yield a sufficiently small vacuum energy spacing to support Brown-Teitelboim membrane nucleation transitions, thereby satisfying cosmological constraints on the universe's age.

James Halverson, Justin Khoury, Cody Long2026-05-08⚛️ hep-th