1205.0813 (Y. -Q. Li et al.)

Supersolid phase of strongly correlated bosons in an optical cavity    [PDF]

Y. -Q. Li, L. He, W. Hofstetter

We numerically simulate strongly correlated ultracold bosons in a high-finesse optical cavity by means of Bosonic Dynamical Mean Field Theory. The complete phase diagram is established, which contains two novel self-organized quantum phases, supersolid and checkerboard solid, in addition to conventional phases such as superfluid and Mott insulator. At finite but low temperature, thermal fluctuations are found to enhance the buildup of the self-organized phases. We demonstrate that cavity-mediated long-range interactions can give rise to stable supersolid and checkerboard solid phases even in the regime of strong s-wave scattering. In the presence of a harmonic trap, we discuss coexistence of these self-organized phases, as relevant to experiments.

View original: http://arxiv.org/abs/1205.0813