Sub-shot-noise quantum metrology with entangled identical particles

Event: 
IICQI 2010
Speaker(s): 
Talk type: 
Contributed
Abstract: 

The usual notion of separability has to be reconsidered when applied to states describing identical particles. A definition of separability not related to any a priori Hilbert space tensor product structure is needed: this can be given in terms of commuting subalgebras of observables. Accordingly, the results concerning the use of the quantum Fisher information in quantum metrology are generalized and physically reinterpreted.

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