Macroscopic Superpositions of Phase States with Bose-Einstein Condensates

Details Macroscopic Superpositions of Phase States with Bose-Einstein Condensates Macroscopic Superpositions of Phase States with Bose-Einstein Condensates

2008-03-17

arxiv.org/abs/0803.2265v2

Phys. Rev. A 78, 051601 (2008)

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1103/PhysRevA.78.051601

Quantum superpositions of macroscopically distinguishable states having distinct phases can be created with a Bose-Einstein condensate trapped in a periodic potential. The experimental signature is contained in the phase distribution of the interference patterns obtained after releasing the traps. Moreover, in the double well case, this distribution exhibits a dramatic dependence on the parity of the total number of atoms. We finally show that, for single well occupations up to a few hundred atoms, the macroscopic quantum superposition can be robust enough against decoherence to be experimentally revealable within current technology.

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