Quantum States and Phases in Driven Open Quantum Systems with Cold Atoms

Understand

An open quantum system, whose time evolution is governed by a master equation, can be driven into a given pure quantum state by an appropriate design of the system-reservoir coupling.

• This points out a route towards preparing many body states and non-equilibrium quantum phases by quantum reservoir engineering.
• Here we discuss in detail the example of a \emph{driven dissipative Bose Einstein Condensate} of bosons and of paired fermions, where atoms in an optical lattice are coupled to a bath of Bogoliubov excitations via the atomic current representing \emph{local dissipation}.
• In the absence of interactions the lattice gas is driven into a pure state with long range order.