Universality is a powerful concept, which enables making qualitative and quantitative
predictions in systems with extensively many degrees of freedom. It finds realizations in …

The Dicke model describes the coupling between a quantized cavity field and a large
ensemble of two‐level atoms. When the number of atoms tends to infinity, this model can …

A state of an open quantum system is described by a density matrix, whose dynamics is
governed by a Liouvillian superoperator. Within a general framework, we explore …

The enormous experimental progress in atomic, molecular, and optical (AMO) physics
during the last decades allows us nowadays to isolate single, a few or even many-body …

We investigate nonequilibrium phase transitions for driven atomic ensembles interacting
with a cavity mode and coupled to a Markovian dissipative bath. In the thermodynamic limit …

Symmetry-breaking transitions are a well-understood phenomenon of closed quantum
systems in quantum optics, condensed matter, and high energy physics. However, symmetry …

Fluids of exciton polaritons, excitations of two-dimensional quantum wells in optical cavities,
show collective phenomena akin to Bose condensation. However, a fundamental difference …

We study an array of coupled optical cavities in the presence of two-photon driving and
dissipation. The system displays a critical behavior similar to that of a quantum Ising model …

We show that short-range correlations have a dramatic impact on the steady-state phase
diagram of quantum driven-dissipative systems. This effect, never observed in equilibrium …

We identify a new universality class in one-dimensional driven open quantum systems with
a dark state. Salient features are the persistence of both the microscopic nonequilibrium …