Critical Behavior in a Driven-Dissipative Quantum Many-Body System

Lukas Sieberer, S. Diehl

Institute for Theoretical Physics, University of Innsbruck, 6020 Innsbruck, Austria
Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, 6020 Innsbruck, Austria

We are investigating critical behavior and universality in an open quantum many-body system with competing unitary and dissipative dynamics, with the goal to establish driven dissipative dark state systems as a novel non-equilibrium universality class. An ideal framework are functional renormalization group equations, which we formulate in terms of a Markovian dissipative action.