TY - JOUR
T1 - Quantum stability of Mott-insulator states of ultracold atoms in optical resonators
AU - Larson, Jonas
AU - Fernández-Vidal, Sonia
AU - Morigi, Giovanna
AU - Lewenstein, Maciej
PY - 2008/4/30
Y1 - 2008/4/30
N2 - We investigate a paradigm example of cavity quantum electro-dynamics with many body systems: an ultracold atomic gas inside a pumped optical resonator, confined by the mechanical potential emerging from the cavity-field spatial mode structure. When the optical potential is sufficiently deep, the atomic gas is in the Mott-insulator (MI) state as in open space. Inside the cavity, however, the potential depends on the atomic distribution, which determines the refractive index of the medium, thus altering the intracavity-field amplitude. We derive the effective Bose-Hubbard model describing the physics of the system in one-dimension and study the crossover between the superfluid-MI quantum states. We predict the existence of overlapping stability regions corresponding to competing insulator-like states. Bistable behavior, controlled by the pump intensity, is encountered in the vicinity of the shifted cavity resonance. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
AB - We investigate a paradigm example of cavity quantum electro-dynamics with many body systems: an ultracold atomic gas inside a pumped optical resonator, confined by the mechanical potential emerging from the cavity-field spatial mode structure. When the optical potential is sufficiently deep, the atomic gas is in the Mott-insulator (MI) state as in open space. Inside the cavity, however, the potential depends on the atomic distribution, which determines the refractive index of the medium, thus altering the intracavity-field amplitude. We derive the effective Bose-Hubbard model describing the physics of the system in one-dimension and study the crossover between the superfluid-MI quantum states. We predict the existence of overlapping stability regions corresponding to competing insulator-like states. Bistable behavior, controlled by the pump intensity, is encountered in the vicinity of the shifted cavity resonance. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
U2 - 10.1088/1367-2630/10/4/045002
DO - 10.1088/1367-2630/10/4/045002
M3 - Article
VL - 10
JO - New Journal of Physics
JF - New Journal of Physics
SN - 1367-2630
M1 - 045002
ER -