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Article Dans Une Revue Physical Review A : Atomic, molecular, and optical physics [1990-2015] Année : 2006

Three-dimensional strong localization of matter waves by scattering from atoms in a lattice with a confinement-induced resonance

Résumé

The possibility of using ultracold atoms to observe strong localization of matter waves is now the subject of a great interest, as undesirable decoherence and interactions can be made negligible in these systems. It was proposed that a static disordered potential can be realized by trapping atoms of a given species in randomly chosen sites of a deep 3D optical lattice with no multiple occupation. We analyze in detail the prospects of this scheme for observing localized states in 3D for a matter wave of a different atomic species that interacts with the trapped particles and that is sufficiently far detuned from the optical lattice to be insensitive to it. We demonstrate that at low energy a large number of 3D strongly localized states can be produced for the matter wave, if the effective scattering length describing the interaction of the matter wave with a trapped atom is of the order of the mean distance between the trapped particles. Such high values of the effective scattering length can be obtained by using a Feshbach resonance to adjust the free space inter-species scattering length and by taking advantage of confinement-induced resonances induced by the trapping of the scatterers in the lattice.
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Dates et versions

hal-00022452 , version 1 (08-04-2006)
hal-00022452 , version 2 (24-05-2006)

Identifiants

Citer

Pietro Massignan, Yvan Castin. Three-dimensional strong localization of matter waves by scattering from atoms in a lattice with a confinement-induced resonance. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2006, 74, pp.013616. ⟨hal-00022452v2⟩
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