Scientific Results

Unearthing wave-function renormalization effects in the time evolution of a Bose-Einstein condensate

Year: 2013

Authors: Facchi P., Pascazio S., Pepe F.V., Arimondo E., Ciampini D., Morsch O.

Autors Affiliation: Dipartimento di Fisica and MECENAS, Università di Bari, I-70126 Bari, Italy INFN, Sezione di Bari, I-70126 Bari, Italy CNISM-Pisa, Dipartimento di Fisica, Università di Pisa, Lgo Pontecorvo 3, I-56127 Pisa, Italy INO-CNR, Dipartimento di Fisica, Università di Pisa, Lgo Pontecorvo 3, I-56127 Pisa, Italy

Abstract: We study the time evolution of a Bose-Einstein condensate in an accelerated optical lattice. When the condensate has a narrow quasi-momentum distribution and the optical lattice is shallow, the survival probability in the ground band exhibits a step-like structure. In this regime, we establish a connection between the wave-function renormalization parameter Z and the phenomenon of resonantly enhanced tunneling.

Journal/Review: PHYSICA SCRIPTA

Volume: T153      Pages from: 014024  to: 014024

More Information: DOI: 10.1088/0031-8949/2013/T153/014024
KeyWords: GAMOW VECTORS; QUANTUM; DECAY; SYSTEMS; STATES
DOI: 10.1088/0031-8949/2013/T153/014024

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