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.

Neural Spectral Bias and Conformal Correlators I: Introduction and Applications

This paper demonstrates that simple feed-forward neural networks can accurately reconstruct diverse conformal field theory correlators using minimal data—specifically crossing symmetry, a single scaling dimension, and one anchor point—by leveraging the spectral bias of gradient-based training to favor the smooth functions characteristic of physical correlators.

Kausik Ghosh, Sidhaarth Kumar, Vasilis Niarchos, Andreas Stergiou2026-04-22⚛️ hep-th

Non-supersymmetric heterotic strings on AdS4×S3×S3AdS_{4}\times S^{3}\times S^{3}

This paper analyzes the stability of tachyon-free non-supersymmetric heterotic string flux compactifications on AdS4×S3×S3AdS_4 \times S^3 \times S^3, revealing that while perturbative tachyons can be avoided or projected out depending on flux separation, the system remains universally unstable to non-perturbative brane nucleation that drives the fluxes toward a tachyonic regime.

Ivano Basile, Daniel Robbins, Hassaan Saleem2026-04-22⚛️ hep-th

Exploring Entropic Orders: High Temperature Continuous Symmetry Breaking, Chiral Topological States and Local Commuting Projector Models

This paper introduces new analytic methods to construct quantum lattice models that exhibit high-temperature entropic orders, including continuous symmetry breaking in 1+1 dimensions and various topological states in 2+1 dimensions, which evade standard no-go theorems by coupling systems to bosonic degrees of freedom that favor ordered states with higher entropy.

Po-Shen Hsin, Ryohei Kobayashi2026-04-22🔬 cond-mat

Confinement in a finite duality cascade

This paper provides holographic consistency checks for a conjectured N=1{\cal N}=1 supersymmetric gauge theory that flows from a conformal UV to gapped IR vacua by demonstrating an area law for Wilson loops, constructing domain walls governed by Yang-Mills-Chern-Simons theory that reproduce the correct anomaly inflow, and showing the instability of axionic strings which confirms the absence of a massless axion.

Fabrizio Aramini, Riccardo Argurio, Matteo Bertolini, Pietro Moroni, Valdo Tatitscheff2026-04-22⚛️ hep-th

Conformal Data for the O(2)O(2) Wilson-Fisher CFT in (2+1)(2+1)-Dimensional Spacetime from Exact Diagonalization and Matrix Product States on the Fuzzy Sphere

This paper utilizes exact diagonalization and matrix product state techniques on a fuzzy sphere to extract conformal data for the (2+1)(2+1)-dimensional O(2)O(2) Wilson-Fisher CFT, identifying 32 primary operators and verifying their scaling dimensions against conformal bootstrap predictions and large charge expansion results.

Arjun Dey, Loic Herviou, Christopher Mudry, Slava Rychkov, Andreas Martin Läuchli2026-04-22⚛️ hep-lat

Thermal Phase Structure of the Attractive Fermi Hubbard Model with Imaginary Chemical Potential

This paper investigates the BCS-BEC crossover in the large-NN attractive Fermi-Hubbard model on a one-dimensional lattice using mean-field theory with an imaginary chemical potential, revealing that the crossover is governed by three key parameters and identifying a specific thermal window at unitarity where the superconducting gap vanishes while the fermion number exhibits extrema, signaling a transition between particle-like and hole-like dominant regimes.

Evangelos G. Filothodoros2026-04-22⚛️ hep-th

String-inspired Gauss-Bonnet Gravity Inflation and ACT

This paper presents a systematic Bayesian MCMC analysis of sixteen ghost-free, string-inspired f(R,G)f(R,\mathcal{G}) inflation models using Planck 2018 and ACT data, demonstrating that while all models successfully reproduce the observed scalar spectral tilt, the preference for specific datasets is driven by the Hubble parametrization rather than the coupling function, with the parameter μ0.1\mu \approx 0.1 emerging as a stable fundamental constant.

S. D. Odintsov, V. K. Oikonomou, Pyotr Tsyba, Olga Razina, Dauren Rakhatov2026-04-22⚛️ gr-qc

Fine-Tuning Small Reasoning Models for Quantum Field Theory

This paper presents the first fine-tuning study of small 7B-parameter reasoning models for Quantum Field Theory, utilizing a novel data generation pipeline to create synthetic and human-adapted training data, and evaluates the effectiveness of Reinforcement Learning and Supervised Fine-Tuning in enhancing domain-specific reasoning while analyzing the evolution of reasoning errors.

Nathaniel S. Woodward, Zhiqi Gao, Yurii Kvasiuk, Kendrick M. Smith, Frederic Sala, Moritz Münchmeyer2026-04-22⚛️ hep-ph