Monodromy in Dicke superradiance
Quantum Physics
2017-08-02 v2 Mathematical Physics
math.MP
Abstract
We study the focus-focus type of monodromy in an integrable version of the Dicke model. Classical orbits forming a pinched torus represent analogues of the dynamic superradiance under conditions of a closed system. Quantum signatures of monodromy appear in lattices of expectation values of various quantities in the Hamiltonian eigenstates and are related to an excited-state quantum phase transition. We demonstrate the breakdown of these structures with an increasing strength of non-integrable perturbation.
Cite
@article{arxiv.1702.07224,
title = {Monodromy in Dicke superradiance},
author = {Michal Kloc and Pavel Stránský and Pavel Cejnar},
journal= {arXiv preprint arXiv:1702.07224},
year = {2017}
}