Entanglement of stationary states in the presence of unstable quasiparticles

• Published in: The journal of high energy physics Vol. 2023; no. 4; pp. 91 - 45
• Main Authors: Horváth, Dávid X., Calabrese, Pasquale, Castro-Alvaredo, Olalla A.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 19.04.2023; Springer Nature B.V; SpringerOpen
• Subjects: Bethe Ansatz; Classical and Quantum Gravitation; Elementary excitations; Elementary Particles; Entropy; Fermions; Field Theories in Lower Dimensions; Field theory; Fixed points (mathematics); High energy physics; Integrable Field Theories; Non-Equilibrium Field Theory; Parameters; Particle mass; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Regular Article - Theoretical Physics; Relativity Theory; Separation; String Theory; Field Theories in Lower Dimensions; Integrable Field Theories; Bethe Ansatz; Non-Equilibrium Field Theory

A bstract The effect of unstable quasiparticles in the out-of-equilibrium dynamics of certain integrable systems has been the subject of several recent studies. In this paper we focus on the stationary value of the entanglement entropy density, its growth rate, and related functions, after a quantum...