报告题目：Quantum Phase Transitions of the Bose-Hubbard Model inside a Cavity

报告人：陈宇  副教授

首都师范大学

时间：2016年5月18日（星期三） 下午3:00

地点：理论物理所报告厅

Abstract: The superfluid to Mott insulator transition and the superradiant transition are textbook examples for quantum phase transition and coherent quantum optics, respectively. Recent experiments in ETH and Hamburg succeeded in loading degenerate bosonic atomic gases in optical lattices inside a cavity, which enables the rst experimental study of the interplay between these two transitions. Here we present the theoretical phase diagram for the ETH experimental setup, and determine the phase boundaries and the orders of the phase transitions between the normal superfluid phase, the superfluid with superradiant light, the normal Mott insulator and the Mott insulator with superradiant light. In contrast to the second-order superradiant transition in a weakly interacting Bose condensation, strong correlations in the superfluid nearby a Mott transition can render the superradiant transition to a first order one.