Quantum phases and entanglement properties of an extended Dicke model
Quantum Physics
2017-06-07 v2
Abstract
We study a simple model describing superradiance in a system of two-level atoms interacting with a single-mode bosonic field. The model permits a continuous crossover between integrable and partially chaotic regimes and shows a complex thermodynamic and quantum phase structure. Several types of excited-state quantum phase transitions separate quantum phases that are characterized by specific energy dependences of various observables and by different atom-field and atom-atom entanglement properties. We observe an approximate revival of some states from the weak atom-field coupling limit in the strong coupling regime.
Keywords
Cite
@article{arxiv.1609.02758,
title = {Quantum phases and entanglement properties of an extended Dicke model},
author = {Michal Kloc and Pavel Stransky and Pavel Cejnar},
journal= {arXiv preprint arXiv:1609.02758},
year = {2017}
}