Localization of a Bose-Einstein-condensate vortex in a bichromatic optical lattice

Journal Article · Thu Apr 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.043636· OSTI ID:21408692

Adhikari, S K ^[1]

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1. Instituto de Fisica Teorica, UNESP, Universidade Estadual Paulista, Barra Funda, 01.140-070 Sao Paulo, Sao Paulo (Brazil)

By numerical simulation of the time-dependent Gross-Pitaevskii equation we show that a weakly interacting or noninteracting Bose-Einstein condensate (BEC) vortex can be localized in a three-dimensional bichromatic quasiperiodic optical-lattice (OL) potential generated by the superposition of two standing-wave polarized laser beams with incommensurate wavelengths. We also study the localization of a (nonrotating) BEC in two and three dimensions by bichromatic OL potentials along orthogonal directions. This is a generalization of the localization of a BEC in a one-dimensional bichromatic OL as studied in a recent experiment [Roati et al., Nature 453, 895 (2008)]. We demonstrate the stability of the localized state by considering its time evolution in the form of a stable breathing oscillation in a slightly altered potential for a large period of time. Finally, we consider the localization of a BEC in a random one-dimensional potential in the form of several identical repulsive spikes arbitrarily distributed in space.

• OSTI ID: 21408692
• Journal Information: Physical Review. A, Vol. 81, Issue 4; Other Information: DOI: 10.1103/PhysRevA.81.043636; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAMS
BOSE-EINSTEIN CONDENSATION
COMPUTERIZED SIMULATION
EQUATIONS
LASERS
ONE-DIMENSIONAL CALCULATIONS
OSCILLATIONS
POTENTIALS
RANDOMNESS
STANDING WAVES
THREE-DIMENSIONAL CALCULATIONS
TIME DEPENDENCE
WAVELENGTHS
SIMULATION