Possible realization of Josephson charge qubits in two coupled Bose-Einstein condensates
arXiv:cond-mat/0107368 · doi:10.1103/PhysRevA.65.022318
Abstract
We demonstrate that two coupled Bose-Einstein condensates (BEC) at zero temperature can be used to realize a qubit which is the counterpart of Josephson charge qubits. The two BEC are weakly coupled and confined in an asymmetric double-well trap. When the "charging energy" of the system is much larger than the Josephson energy and the system is biased near a degeneracy point, the two BEC represent a qubit with two states differing only by one atom. The realization of the BEC qubits in realistic BEC experiments is briefly discussed.
4 pages; comments are welcome / Corrected typos in Eq. (16); a note added
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