Demonstrating mesoscopic superpositions in double-well Bose-Einstein condensates

Details Demonstrating mesoscopic superpositions in double-well Bose-Einstein condensates Demonstrating mesoscopic superpositions in double-well Bose-Einstein condensates

2009-07-08

arxiv.org/abs/0907.1333v1

Physics

Quantum Physics

14 pages, 8 figures

Scientific paper

The availability of Bose-Einstein condensates as mesoscopic or macroscopic quantum objects has aroused new interest in the possiblity of making and detecting coherent superpositions involving many atoms. In this article we show that it may be possible to generate such a superposition state in a reasonably short time using Feshbach resonances to tune the inter-atomic interactions in a double-well condensate. We also consider the important problem of distinguishing whether a coherent superposition or a statistical mixture is generated by a given experimental procedure. We find that unambiguously distinguishing even a perfect `NOON' state from a statistical mixture using standard detection methods will present experimental difficulties.

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