Acta Physica Sinica

The ground state solutions of two-component Bose-Einstein condensates in Bessel optical lattices

Chen Hai-Jun, Xue Ju-Kui, 西北师范大学物理与电子工程学院，兰州 730070

Published Jan 1, 2008• 7 citations

Abstract

The ground state solutions of two-component Bose-Einstein condensates (BECs) in Bessel optical lattices (BLs) are studied by means of the balance condition between BLs strength and inter-atomic interactions. We consider a quasi-two-dimensional (2D) BECs system，strongly confined in longitudinal direction and weakly trapped in the radial direction in the transverse plane，which obeys 2D Gross-Pitaevskii equation (GPE) derived from its 3D counterpart. Analytically we obtained the atom number distribution，atom number and energy of ground state and give the parameter ranges. Compared to single-component BEC，two-component BECs exhibit a rich variety of ground state structures. These structures depend upon various parameters，in particular the inter-atomic interactions and the BLs strength. Neglecting the inter-component atomic interaction，the corresponding results of single-component situation are given.

DOI: 10.7498/aps.57.3962

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