Collective excitations of a strongly-correlated non-equilibrium photon fluid across the Mott/superfluid phase transition

Fabio Caleffi, Massimo Capone, Iacopo Carusotto

We develop a Gutzwiller theory for the non-equilibrium steady states of a strongly-interacting photon fluid driven by a non-Markovian incoherent pump. In particular, we explore the…