Entanglement and quench dynamics in the thermally perturbed tricritical fixed point
Abstract
We consider the Blume–Capel model in the scaling limit to realize the thermal perturbation of the tricritical Ising fixed point. We develop a numerical scaling limit extrapolation for one-point functions and Rényi entropies in the ground state. In a mass quench scenario, we found long-lived oscillations despite the absence of explicit spin-flip symmetry breaking or confining potential. We construct form factors of branch-point twist fields in the paramagnetic phase. In the scaling limit of small quenches, we verify form factor predictions for the energy density and leading magnetic field using the dynamics of one-point functions, and branch-point twist fields using the dynamics of Rényi entropies.
Fields of Study & Subjects
Quantum many-body systems
Theoretical and Computational Physics
Physics of Superconductivity and Magnetism
Publication details
- Journal / source
- SciPost Physics
- Publisher
- Stichting SciPost
- Volume
- 20
- Issue
- 2
- Publication date
- 3 February 2026
- Language
- EN