Nonequilibrium Phase Transition of Interacting Bosons in an Intra-Cavity Optical Lattice
Abstract
We investigate the nonlinear light-matter interaction of a Bose-Einstein condensate trapped in an external periodic potential inside an optical cavity which is weakly coupled to vacuum radiation modes and driven by a transverse pump field. Based on a generalized Bose-Hubbard model which incorporates a single cavity mode, we include the collective backaction of the atoms on the cavity light field and determine the nonequilibrium quantum phases within the nonperturbative bosonic dynamical mean-field theory.With the system parameters adapted to recent experiments, we find a quantum phase transition from a normal phase to a self-organized superfluid phase, which is related to the Hepp-Lieb-Dicke superradiance phase transition. For even stronger pumping, a self-organized Mott insulator phase arises.
Keywords
Cite
@article{arxiv.1410.5735,
title = {Nonequilibrium Phase Transition of Interacting Bosons in an Intra-Cavity Optical Lattice},
author = {M. Reza Bakhtiari and Andreas Hemmerich and Helmut Ritsch and Michael Thorwart},
journal= {arXiv preprint arXiv:1410.5735},
year = {2015}
}
Comments
5 pages, 4 figures. published version