Non-equilibrium dynamics of coupled qubit-cavity arrays
  We study the coherence and fluorescence properties of the coherently pumped and dissipative Jaynes-Cummings-Hubbard model describing polaritons in a coupled-cavity array. At weak hopping we find strong signatures of photon blockade similar to single-cavity systems. At strong hopping the state of the photons in the array depends on its size. While the photon blockade persists in a dimer consisting of two coupled cavities, a coherent state forms on an extended lattice, which can be described in terms of a semi-classical model. 
Felix Nissen, Sebastian Schmidt, Matteo Biondi, Gianni Blatter, Hakan   E. T\"ureci, Jonathan Keeling
cond-mat.quant-gas quant-ph