Fermionic superradiance in a transversely pumped optical cavity.
Following the experimental realization of Dicke superradiance in Bose gases coupled to cavity light fields, we investigate the behavior of ultracold fermions in a transversely pumped cavity. We focus on the equilibrium phase diagram of spinless fermions coupled to a single cavity mode and establish a zero temperature transition to a superradiant state. In contrast to the bosonic case, Pauli blocking leads to lattice commensuration effects that influence self-organization in the cavity light field. This includes a sequence of discontinuous transitions with increasing atomic density and tricritical superradiance. We discuss the implications for experiment.
SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, United Kingdom.
J
J
Keeling
Department of Physics, King's College London, Strand, London WC2R 2LS, United Kingdom.
M J
MJ
Bhaseen
University of Cambridge, Cavendish Laboratory, Cambridge CB3 0HE, United Kingdom.
B D
BD
Simons