Coherent single atom shuttle between two Bose-Einstein condensates

Details Coherent single atom shuttle between two Bose-Einstein condensates Coherent single atom shuttle between two Bose-Einstein condensates

2007-09-11

arxiv.org/abs/0709.1542v2

Phys. Rev. A 77, 031602(R) (2008)

Physics

Condensed Matter

Other Condensed Matter

4 pages of RevTex4, 4 figures; Rapid Communication in Physical Review A

Scientific paper

10.1103/PhysRevA.77.031602

We study an atomic quantum dot representing a single hyperfine "impurity" atom which is coherently coupled to two well-separated Bose-Einstein condensates, in the limit when the coupling between the dot and the condensates dominates the inter-condensate tunneling coupling. It is demonstrated that the quantum dot by itself can induce large-amplitude Josephson-like oscillations of the particle imbalance between the condensates, which display a two-frequency behavior. For noninteracting condensates, we provide an approximate solution to the coupled nonlinear equations of motion which allows us to obtain these two frequencies analytically.

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