Matter-wave interference, Josephson oscillation and its disruption in a Bose-Einstein condensate on an optical lattice

被引：8
作者：
Adhikari, SK [1 ]
机构：
[1] Univ Estadual Paulista, Inst Fis Teor, BR-01405900 Sao Paulo, Brazil
来源：
NUCLEAR PHYSICS A | 2004年 / 737卷
关键词：
D O I：
10.1016/j.nuclphysa.2004.03.090
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Using the axially-symmetric time-dependent mean-field Gross-Pitaevskii equation we study the Josephson oscillation in a repulsive Bose-Einstein condensate trapped by a harmonic plus an one-dimensional optical-lattice potential to describe the experiments by Cataliotti et al. [Science 293 (2001) 843, New J. Phys. 5 (2003) 71.1]. After a study of the formation of matter-wave interference upon releasing the condensate from the optical trap, we directly investigate the alternating atomic superfluid Josephson current upon displacing the harmonic trap along the optical axis. The Josephson current is found to be disrupted upon displacing the harmonic trap through a distance greater than a critical distance signaling a superfluid to a classical insulator transition in the condensate. © 2004 Published by Elsevier B.V.
引用
收藏
页码：289 / 293
页数：5
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