Non-symmetric entanglement of atomic ensembles

Details Non-symmetric entanglement of atomic ensembles Non-symmetric entanglement of atomic ensembles

2004-01-22

arxiv.org/abs/quant-ph/0401143v1

Physical Review Letters 92, 030407 (2004).

Physics

Quantum Physics

to appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.92.030407

The entanglement of multi-atom quantum states is considered. In order to cancel noise due to inhomogeneous light atom coupling, the concept of matched multi-atom observables is proposed. As a means to eliminate an important form of decoherence this idea should be of broad relevance for quantum information processing with atomic ensembles. The general approach is illustrated on the example of rotation angle measurement, and it is shown that the multi-atom states that were thought to be only weakly entangled can exhibit near-maximum entanglement.

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