Extended Coherence Time with Atom-Number Squeezed Sources

Details Extended Coherence Time with Atom-Number Squeezed Sources Extended Coherence Time with Atom-Number Squeezed Sources

2006-09-02

arxiv.org/abs/quant-ph/0609009v1

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.98.040402

Coherence properties of Bose-Einstein condensates offer the potential for improved interferometric phase contrast. However, decoherence effects due to the mean-field interaction shorten the coherence time, thus limiting potential sensitivity. In this work, we demonstrate increased coherence times with number squeezed states in an optical lattice using the decay of Bloch oscillations to probe the coherence time. We extend coherence times by a factor of 2 over those expected with coherent state BEC interferometry. We observe quantitative agreement with theory both for the degree of initial number squeezing as well as for prolonged coherence times.

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