Experimental Realization of Quantum-Resonance Ratchets

Details Experimental Realization of Quantum-Resonance Ratchets Experimental Realization of Quantum-Resonance Ratchets

2007-06-06

arxiv.org/abs/0706.0871v3

Physical Review Letters 100, 024103 (2008)

Physics

Atomic Physics

Accepted for publication in Physical Review Letters (November 2007)

Scientific paper

10.1103/PhysRevLett.100.024103

Quantum-resonance ratchets associated with the periodically kicked particle are experimentally realized for the first time. This is achieved by using a Bose-Einstein condensate exposed to a pulsed standing light wave and prepared in an initial state differing from the usual plane wave. Both the standing-wave potential and the initial state have a point symmetry around some center and the ratchet arises from the non-coincidence of the two centers. The dependence of the directed quantum transport on the quasimomentum is studied. A detailed theoretical analysis is used to explain the experimental results.

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