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Quantum-resonance ratchet in a kicked Bose-Einstein condensate

Qu Chun-Lei Zhao Qing

Quantum-resonance ratchet in a kicked Bose-Einstein condensate

Qu Chun-Lei, Zhao Qing
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  • Abstract views:  3542
  • PDF Downloads:  924
  • Cited By: 0
Publishing process
  • Received Date:  29 September 2008
  • Accepted Date:  23 October 2008
  • Published Online:  20 July 2009

Quantum-resonance ratchet in a kicked Bose-Einstein condensate

  • 1. 北京理工大学理学院物理系,北京 100081

Abstract: The dynamical evolution of a periodically kicked Bose-Einstein condensate was investigated by simulation. Emphasis was placed on the influence of the nonlinear interaction between atoms on the quantum-resonance ratchet effect. It was found that weak nonlinear interaction reduces the ratchet effect while the strong nonlinear interaction causes the ratchet current to disappear or even reversed. The ratchet effect under high-order quantum resonance conditions was further studied. The ratchet effect is not obvious in this case and can be easily destroyed by the noise of the kicking potential period.

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