Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/78947
Type: Artigo de periódico
Title: COLLISION-DEPENDENT ATOM TUNNELING RATE - BOSE-EINSTEIN CONDENSATES IN DOUBLE AND MULTIPLE WELL TRAPS
Author: De Oliveira, MC
Da Cunha, BR
Abstract: 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.
Subject: Bose-Einstein condensates in periodic potentials
tunneling
Josephson effect
atoms in optical lattices
Country: Singapura
Editor: World Scientific Publ Co Pte Ltd
Rights: fechado
Identifier DOI: 10.1142/S0217979209054818
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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