Cavity-loss induced plateau in coupled cavity QED array
  Nonequilibrium steady states are investigated in a coupled cavity QED array system which is pumped by a thermal bath and dissipated through cavity loss. In the coherent (non-zero photon amplitude) phase, plateau regions appear, where the steady states become unchanged against the variation of the chemical potential of the thermal bath. The cavity loss plays a crucial role for the plateaus: the plateaus appear only if the cavity loss exists, and the photon leakage current, which is induced by the loss, is essential to the mechanism of the plateaus. 
Tatsuro Yuge, Kenji Kamide, Makoto Yamaguchi, Tetsuo Ogawa
quant-ph cond-mat.stat-mech