Publicação: Matter-wave localization in a random potential
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Data
2010-07-26
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Amer Physical Soc
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Artigo
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Acesso aberto
Resumo
By numerical and variational solutions of the Gross-Pitaevskii equation, we studied the localization of a noninteracting and weakly interacting Bose-Einstein condensate (BEC) in a disordered cold atom lattice and a speckle potential. In the case of a single BEC fragment, the variational analysis produced good results. For a weakly disordered potential, the localized BEC's are found to have an exponential tail as in the weak Anderson localization. We also investigated the expansion of a noninteracting BEC in these potentials. We find that the BEC will be locked in an appropriate localized state after an initial expansion and will execute breathing oscillation around a mean shape when a BEC at equilibrium in a harmonic trap is suddenly released into a disorder potential.
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Inglês
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Physical Review A. College Pk: Amer Physical Soc, v. 82, n. 1, p. 7, 2010.
