2014/10/31 by M. Reza Bakhtiari, Andreas Hemmerich, Helmut Ritsch +1 · 4 citations
Physics and Astronomy · #Bose–Einstein condensate #Bose–Hubbard model #Boson #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Hubbard model #Laser #Mechanical and Optical Resonators #Non-equilibrium thermodynamics #Optical cavity #Optical lattice #Phase transition #Physics #Quantum #Quantum electrodynamics #Quantum fluctuation #Quantum mechanics #Quantum phase transition #Quantum phases #Strong Light-Matter Interactions #Superconductivity #Superfluidity #Superradiance #cond-mat.quant-gas #quant-ph
paper · pdf · doi:10.1103/physrevlett.114.123601
published as Phys.Rev.Lett 114, 123601 (2015) · 5 pages, 4 figures. published version
arxiv created 2015/03/25 · openalex publication_date 2015/03/25 · arxiv updated 2015/03/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.