Decay and revival of phase coherence of a Bose-Einstein condensate in a one-dimensional lattice

Year: 2003

Authors: Morsch O., Mueller J.H., Ciampini D., Cristiani M., Blakie P.B., Williams C.J., Julienne P.S., Arimondo E.

Autors Affiliation: INFM, Dipartimento di Fisica E. Fermi, Università di Pisa, Via Buonarroti 2, I-56127 Pisa, Italy; National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8423

Abstract: The dynamics of a Bose-Einstein condensate nonadiabatically loaded into a one-dimensional optical lattice is studied by analyzing the phase coherence between sites along the lattice as well as the radial profile of the condensate after a time-of flight. A simple model is proposed that predicts the short-time dephasing as a function of the condensate parameters. In the radial direction, heavily damped oscillations are observed, as well as an increase in the condensate temperature. These findings are interpreted as a rethermalization due to dissipation of the initial condensate excitations into high-lying modes.

Journal/Review: PHYSICAL REVIEW A

Volume: 67 (3)      Pages from: 031603  to: 031603

KeyWords: Bose-Einstein condensation; Optical lattices;
DOI: 10.1103/PhysRevA.67.031603

Citations: 22
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