Controllable Persistent Atom Current of Bose-Einstein Condensates in an Optical Lattice Ring

Details Controllable Persistent Atom Current of Bose-Einstein Condensates in an Optical Lattice Ring Controllable Persistent Atom Current of Bose-Einstein Condensates in an Optical Lattice Ring

2005-06-05

arxiv.org/abs/cond-mat/0506115v1

Communications in Theoretical Physics 43, 819 (2005)

Physics

Condensed Matter

Other Condensed Matter

9 pages, 1 figures

Scientific paper

In this paper the macroscopic quantum states of Bose-Einstein condensates in optical lattices is studied by solving the periodic Gross-Pitaevskii equation in one-dimensional geometry. It is shown that an exact solution seen to be a travelling wave of excited macroscopic quantum states resultes in a persistent atom current which can be controlled by adjusting of the barrier height of the optical periodic potential. A critical condition to generate the travelling wave is demonstrated and we moreover propose a practical experiment to realize the persistent atom current in a toroidal atom waveguide.

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