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Wave Function Renormalization Effects in Resonantly Enhanced Tunneling

Lörch, N. and Pepe, F. V. and Lignier, H. and Ciampini, D. and Mannella, R. and Morsch, O. and Arimondo, E. and Facchi, P. and Florio, G. and Pascazio, S. and Wimberger, S. (2012) Wave Function Renormalization Effects in Resonantly Enhanced Tunneling. Physical review. A, Atomic, Molecular, and Optical Physics, 85 . 053602. ISSN 1094-1622

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We study the time evolution of ultra-cold atoms in an accelerated optical lattice. For a Bose- Einstein condensate with a narrow quasi-momentum distribution in a shallow optical lattice the decay of the survival probability in the ground band has a step-like structure. In this regime we establish a connection between the wave function renormalization parameter Z introduced in [Phys. Rev. Lett. 86, 2699 (2001)] to characterize non-exponential decay and the phenomenon of resonantly enhanced tunneling, where the decay rate is peaked for particular values of the lattice depth and the accelerating force.

Item Type: Article
Additional Information: Imported from arXiv
Subjects: Area02 - Scienze fisiche > FIS/03 - Fisica della materia
Divisions: Dipartimenti (from 2013) > DIPARTIMENTO DI FISICA
Depositing User: dott.ssa Sandra Faita
Date Deposited: 30 Jul 2013 12:52
Last Modified: 30 Jul 2013 12:52
URI: http://eprints.adm.unipi.it/id/eprint/1290

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