Sub-shot-noise quantum metrology with entangled identical particles

Details Sub-shot-noise quantum metrology with entangled identical particles Sub-shot-noise quantum metrology with entangled identical particles

2010-01-19

arxiv.org/abs/1001.3313v1

Annals of Physics 325 (2010) 924-935

Physics

Quantum Physics

17 pages, LaTeX

Scientific paper

10.1016/j.aop.2010.01.005

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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