SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, United Kingdom.
Department of Physics, King's College London, Strand, London WC2R 2LS, United Kingdom.
Phys Rev Lett. 2014 Apr 11;112(14):143002. doi: 10.1103/PhysRevLett.112.143002. Epub 2014 Apr 8.
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.
在玻色气体与腔光场耦合的情况下实现了狄克超辐射之后，我们研究了横向泵送腔中超冷费米子的行为。我们专注于无自旋费米子与单个腔模耦合的平衡相图，并建立了零温到超辐射态的转变。与玻色情况不同，泡利阻塞导致晶格协调效应，影响腔光场中的自组织。这包括随着原子密度的增加而出现的一系列不连续跃迁和三临界点超辐射。我们讨论了对实验的影响。
