Dissipative preparation of spatial order in Rydberg-dressed Bose-Einstein condensates

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 dynamic...

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Bibliographic Details
Published in:Physical review letters 2014-08, Vol.113 (7), p.070401-070401, Article 070401
Main Authors: Otterbach, Johannes, Lemeshko, Mikhail
Format: Article
Language:English
Subjects:
Bose-Einstein condensates
Cold atoms
Dissipation
Dynamical systems
Dynamics
Optical lattices
Order disorder
Phases
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Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.113.070401