Localization of a Bose-Einstein condensate in a bichromatic optical lattice
Year: 2009
Authors: Adhikari S.K., Salasnich L.
Autors Affiliation: Instituto de Física Teórica, UNESP–São Paulo State University, Barra Funda, 01.140-070 São Paulo, SP, Brazil;
CNR–INFM and CNISM, Unità di Padova, Dipartimento di Fisica “Galileo Galilei,”Università di Padova, Via Marzolo 8,
35131 Padova, Italy
Abstract: By direct numerical simulation of the time-dependent Gross-Pitaevskii equation, we study different aspects of the localization of a noninteracting ideal Bose-Einstein condensate (BEC) in a one-dimensional bichromatic quasiperiodic optical-lattice potential. Such a quasiperiodic potential, used in a recent experiment on the localization of a BEC [Roati et al., Nature (London) 453, 895 (2008)], can be formed by the superposition of two standing-wave polarized laser beams with different wavelengths. We investigate the effect of the variation of optical amplitudes and wavelengths on the localization of a noninteracting BEC. We also simulate the nonlinear dynamics when a harmonically trapped BEC is suddenly released into a quasiperiodic potential, as done experimentally in a laser speckle potential [Billy et al., Nature (London) 453, 891 (2008)]. We finally study the destruction of the localization in an interacting BEC due to the repulsion generated by a positive scattering length between the bosonic atoms.
Journal/Review: PHYSICAL REVIEW A
Volume: 80 (2) Pages from: 023606 to: 023606
More Information: FAPESP (Brazil), CNPq (Brazil), and CARIPARO (Italy) provided partial support.DOI: 10.1103/PhysRevA.80.023606ImpactFactor: 2.866Citations: 60data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-10References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here
