Limits to phase resolution in matter wave interferometry

Details Limits to phase resolution in matter wave interferometry Limits to phase resolution in matter wave interferometry

2004-07-02

arxiv.org/abs/quant-ph/0407015v1

Physics

Quantum Physics

10 pages, 9 figures

Scientific paper

10.1103/PhysRevA.70.063612

We study the quantum dynamics of a two-mode Bose-Einstein condensate in a time-dependent symmetric double-well potential using analytical and numerical methods. The effects of internal degrees of freedom on the visibility of interference fringes during a stage of ballistic expansion are investigated varying particle number, nonlinear interaction sign and strength as well as tunneling coupling. Expressions for the phase resolution are derived and the possible enhancement due to squeezing is discussed. In particular, the role of the superfluid - Mott insulator cross-over and its analog for attractive interactions is recognized.

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