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Precision quantum metrology and nonclassicality in linear and nonlinear detection schemes

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Rivas, Ángel and Luis Aina, Alfredo (2010) Precision quantum metrology and nonclassicality in linear and nonlinear detection schemes. Physical review letters, 105 (1). 010403_1-010403_4. ISSN 0031-9007

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.105.010403


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http://journals.aps.org/Publisher


Abstract

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.


Item Type:Article
Additional Information:

© 2010. The American Physical Society. A. R. acknowledges Susana F. Huelga for illuminating comments and financial support from the EU Integrated Projects QAP, QESSENCE, and the STREP action CORNER. A. L. acknowledges support from official Spanish projects No. FIS2008-01267 and QUITEMAD S2009-ESP-1594.

Uncontrolled Keywords:Wigner function; Phase measurements; Heisenberg limit; Density-matrices; Number; States; Computation; Distance; Space
Subjects:Sciences > Physics > Optics
ID Code:30878
Deposited On:15 Jun 2015 15:28
Last Modified:16 Jun 2015 08:12

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