Journal
ANNALS OF PHYSICS
Volume 325, Issue 4, Pages 924-935Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.aop.2010.01.005
Keywords
Quantum entanglement; Identical particles; Quantum metrology; Sub-shot-noise limit
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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 sub-algebras of observables. Accordingly, the results concerning the use of the quantum Fisher information in quantum metrology are generalized and physically reinterpreted. (C) 2010 Elsevier Inc. All rights reserved
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