⚛️ Category

hep-th

3170 papers

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

Quantum Brownian motion with non-Gaussian noises: Fluctuation-Dissipation Relation and nonlinear Langevin equation

This paper employs the closed-time-path formalism to derive a modified fluctuation-dissipation relation and a nonlinear Langevin equation for quantum Brownian motion with non-Gaussian noises arising from a system nonlinearly coupled to a harmonic oscillator environment, thereby providing a framework for analyzing non-Gaussian properties in fields like early universe cosmology and quantum optomechanics.

Hing-Tong Cho, Bei-Lok Hu2026-02-23
⚛️ general relativity

There and back again -- Closed timelike curves as EFT selection principle

This paper proposes a new guiding principle for modified-gravity effective field theories—that closed timelike curves should be harder to obtain than in General Relativity—and demonstrates how this causal constraint, alongside stability requirements, yields unique parameter bounds on Horndeski-based rotating black holes while offering a novel gravitational-wave probe via quasinormal modes and echoes to diagnose spacetime causality.

Bum-Hoon Lee, Nils A. Nilsson, Somyadip Thakur2026-02-23
🔢 mathematics

Chern-Simons deformations of the gauged O(3) Sigma model on compact surfaces

This paper establishes the existence of solutions to the gauged Chern-Simons-O(3)-Sigma model on compact Riemann surfaces using topological methods, demonstrating that solutions exist for small deformation parameters with multiple solutions when vortex and antivortex counts differ, while proving global existence for any parameter value when these counts are equal, alongside numerical investigations on the sphere.

Rene I. Garcia-Lara2026-02-23
⚛️ lattice

Phase diagram of a lattice fermion model with symmetric mass generation

Using fermion-bag Monte Carlo simulations, this study demonstrates that introducing a small nonzero four-fermion coupling (UBU_B) to a lattice fermion model qualitatively alters its phase diagram by splitting a single exotic symmetric mass generation transition into two distinct conventional transitions (Gross-Neveu and 3D XY) separated by an intermediate spontaneous symmetry breaking phase.

Sandip Maiti, Debasish Banerjee, Shailesh Chandrasekharan, Marina K. Marinkovic2026-02-23
⚛️ lattice

Pseudocriticality in antiferromagnetic spin chains

By combining advanced quantum Monte Carlo simulations with a novel loop estimator for Rényi entanglement entropy, this study demonstrates that an SU(NN) generalization of the Heisenberg antiferromagnet in 1+1 dimensions exhibits weak first-order pseudocriticality driven by proximity to a complex conformal field theory, a finding that accurately recovers the real part of the complex central charge for N>2N>2 and reinterprets the dimerized phase of the spin-1 chain as pseudocritical.

Sankalp Kumar, Sumiran Pujari, Jonathan D'Emidio2026-02-20
⚛️ general relativity

Bayesian Inference of Gravity through Realistic 3D Modeling of Wide Binary Orbits: General Algorithm and a Pilot Study with HARPS Radial Velocities

This paper presents a general Bayesian algorithm for inferring the gravitational constant from wide binary orbits using 3D modeling and applies it in a pilot study of 32 Gaia systems with HARPS radial velocities, finding tentative evidence for a deviation from Newtonian gravity that is heavily influenced by a single outlier system and requires further verification.

Kyu-Hyun Chae2026-02-20