Nonequilibrium Phase Diagram of a Driven-Dissipative Many-Body System

Understand

We study the nonequilibrium dynamics of a many-body bosonic system on a lattice, subject to driving and dissipation.

• The time-evolution is described by a master equation, which we treat within a generalized Gutzwiller mean field approximation for density matrices.
• The dissipative processes are engineered such that the system, in the absence of interaction between the bosons, is driven into a homogeneous steady state with off-diagonal long range order.
• We investigate how the coherent interaction affects qualitatively the properties of the steady state of the system and derive a nonequilibrium phase diagram featuring a phase transition into a steady state without long range order.