Cheng, Yongshan [UNESP]Adhikari, Sadhan Kumar [UNESP]2013-09-302014-05-202013-09-302014-05-202010-02-01Physical Review A. College Pk: Amer Physical Soc, v. 81, n. 2, p. 8, 2010.1050-2947http://hdl.handle.net/11449/24497By direct numerical simulation of the time-dependent Gross-Pitaevskii equation using the split-step Fourier spectral method, we study different aspects of the localization of a cigar-shaped interacting binary (two-component) Bose-Einstein condensate (BEC) in a one-dimensional bichromatic quasiperiodic optical-lattice potential, as used in a recent experiment on the localization of a BEC [Roati et al., Nature 453, 895 (2008)]. We consider two types of localized states: (i) when both localized components have a maximum of density at the origin x = 0, and (ii) when the first component has a maximum of density and the second a minimum of density at x = 0. In the noninteracting case, the density profiles are symmetric around x = 0. We numerically study the breakdown of this symmetry due to interspecies and intraspecies interactions acting on the two components. Where possible, we have compared the numerical results with a time-dependent variational analysis. We also demonstrate the stability of the localized symmetry-broken BEC states under small perturbation.8engArtigo10.1103/PhysRevA.81.023620WOS:000275072500159Acesso abertoWOS000275072500159.pdf8031087349809439