Open AccessQuantum-resonance ratchet in a kicked Bose-Einstein condensate
Author(s) -
Chunlei Qu,
Qing Zhao
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.4390
Subject(s) - ratchet , ratchet effect , physics , bose–einstein condensate , resonance (particle physics) , nonlinear system , quantum , quantum mechanics , classical mechanics , work (physics)
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.