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COLLISION-DEPENDENT ATOM TUNNELING RATE — BOSE–EINSTEIN CONDENSATES IN DOUBLE AND MULTIPLE WELL TRAPS

DE OLIVEIRA, M. C ; DA CUNHA, B. R

International journal of modern physics. B, Condensed matter physics, statistical physics, applied physics, 2009-12, Vol.23 (32), p.5867-5880 [Periódico revisado por pares]

World Scientific Publishing Company

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  • Título:
    COLLISION-DEPENDENT ATOM TUNNELING RATE — BOSE–EINSTEIN CONDENSATES IN DOUBLE AND MULTIPLE WELL TRAPS
  • Autor: DE OLIVEIRA, M. C ; DA CUNHA, B. R
  • É parte de: International journal of modern physics. B, Condensed matter physics, statistical physics, applied physics, 2009-12, Vol.23 (32), p.5867-5880
  • Notas: ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-1
    content type line 23
  • Descrição: The overlap of localized wave functions in a two-mode approximation leads to interaction (cross-collision) between ultra-cold atoms trapped in distinct sites of a double-well potential. We show that this interaction can significantly change the atom tunneling rate for special trap configurations resulting in an effective linear Rabi regime of population oscillation between the trap wells. In this sense, we demonstrate that cross-collisional effects can significantly extend the validity of the two-mode model approach allowing it to be alternatively employed to explain the recently observed increase of tunneling rates due to nonlinear interactions. Moreover, we investigate the extension for ultra-cold atoms trapped in an optical lattice. Control over the cross-collisional terms, obtained through manipulation of the optical trapping potential, can be used as an engineering tool to study many-body physics.
  • Editor: World Scientific Publishing Company
  • Idioma: Inglês;Chinês
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