title: Dissipative preparation of spatial order in Rydberg-dressed Bose-Einstein condensates.
abstract: We propose a technique for engineering momentum-dependent dissipation in Bose-Einstein condensates with nonlocal interactions. The scheme relies on the use of momentum-dependent dark states in close analogy to velocity-selective coherent population trapping. During the short-time dissipative dynamics, the system is driven into a particular finite-momentum phonon mode, which in real space corresponds to an ordered structure with nonlocal density-density correlations. Dissipation-induced ordering can be observed and studied in present-day experiments using cold atoms with dipole-dipole or off-resonant Rydberg interactions. Because of its dissipative nature, the ordering does not require artificial breaking of translational symmetry by an optical lattice or harmonic trap. This opens up a perspective of direct cooling of quantum gases into strongly interacting phases.
authors.affiliation: Physics Department, Harvard University, 17 Oxford Street, Cambridge, Massachusetts 02138, USA.
authors.forename: Johannes
authors.initials: J
authors.lastname: Otterbach
authors.affiliation: Physics Department, Harvard University, 17 Oxford Street, Cambridge, Massachusetts 02138, USA and ITAMP, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, USA.
authors.forename: Mikhail
authors.initials: M
authors.lastname: Lemeshko