Circuit QED bright source for chiral entangled light based on   dissipation
  Based on a circuit QED qubit-cavity array a source of two-mode entangled microwave radiation is designed. Our scheme is rooted in the combination of external driving, collective phenomena and dissipation. On top of that the reflexion symmetry is broken via external driving permitting the appearance of chiral emission. Our findings go beyond the applications and are relevant for fundamental physics, since we show how to implement quantum lattice models exhibiting criticality driven by dissipation. 
Fernando Quijandr\'ia, Diego Porras, Juan Jos\'e Garc\'ia-Ripoll,   David Zueco
quant-ph