Precision quantum metrology and nonclassicality in linear and nonlinear detection schemes

Details Precision quantum metrology and nonclassicality in linear and nonlinear detection schemes Precision quantum metrology and nonclassicality in linear and nonlinear detection schemes

2010-02-16

arxiv.org/abs/1002.3075v2

Phys. Rev. Lett. 105, 010403 (2010)

Physics

Quantum Physics

4 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.105.010403

We examine whether metrological resolution beyond coherent states is a
nonclassical effect. We show that this is true for linear detection schemes but
false for nonlinear schemes, and propose a very simple experimental setup to
test it. We find a nonclassicality criterion derived from quantum Fisher
information.

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