# Correlations in driven-dissipative quantum systems

**Speaker:**Michiel Wouters, University of Antwerp

**When:**September 13, 2017 (Wed), 11:00AM to 12:00PM (add to my calendar)

**Location:**SCI 328

*This event is part of the Condensed Matter Theory Seminar Series. *

Recent advances in experimental platforms for photonic quantum simulators (microcavity polaritons and superconducting circuits) have spurred the interest in the theory of driven-dissipative quantum systems. The long time steady state of such systems is not given by a Boltzmann-Gibbs distribution, but has to be found by solving a Lindblad master equation.

In this talk, I will discuss two topics: for weakly interacting systems, the imprint of Landau-Beliaev scattering on the steady state distribution of a 1D photonic Hubbard model in the weakly interacting regime and the failure of the truncated Wigner approximation to capture this feature. For strongly interacting systems, I will present results obtained within the Gutzwiller approximation to the quantum trajectories of a dissipative XYZ model. We show that a ferromagnetic to paramagnetic phase transition, that is missing within a mean field treatment, is recovered within our approach.