Coherent ratchets in driven Bose-Einstein condensates
arXiv:0908.0692 · doi:10.1103/PhysRevLett.103.200601
Abstract
We study the response of a Bose-Einstein condensate to an unbiased periodic driving potential. By controlling the space and time symmetries of the driving we show how a directed current can be induced, producing a coherent quantum ratchet. Weak driving induces a regular behavior that is strongly governed by the interparticle interaction. Breaking both space and time symmetries is required to produce current flow. For strong driving the behavior becomes chaotic. The resulting effective irreversibility renders the space asymmetry sufficient to produce the ratchet effect, although the system is completely coherent.
5 pages, 4 eps figures. Minor changes, this version to be published in PRL
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Cited by in corpus (11)
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- Effective Josephson dynamics in resonantly driven Bose-Einstein condensates
- Perturbative analysis of coherent quantum ratchets in cold atom systems
- Orbital Josephson effect and interactions in driven atom condensates on a ring
- Nonlinear, Nonequilibrium and Collective Dynamics in a Periodically Modulated Cold Atom System
- Comment on "Coherent Ratchets in Driven Bose-Einstein Condensates"
- Asymptotic population imbalance of an ultracold bosonic ensemble in a driven double-well
- Directed transport in a classical lattice with a high-frequency driving
- Reply to the Comment by Benenti et al
- Persistent current by a static non-Hermitian ratchet
- Tailored particle current in an optical lattice by a weak time-symmetric harmonic potential