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Optimum phase-shift estimation and the quantum description of the phase difference

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Luis Aina, Alfredo and Peřina, J. (1996) Optimum phase-shift estimation and the quantum description of the phase difference. Physical review A, 54 (5). pp. 4564-4570. ISSN 1050-2947

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Official URL: http://dx.doi.org/10.1103/PhysRevA.54.4564


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http://journals.aps.org/Publisher


Abstract

The problem of a correct quantum description of the phase difference is examined from the perspective of parameter estimation theory. It is shown that an optimum phase-shift measurement defines a phase difference operator which coincides with other approaches to the same problem. We also study the fundamental limit to the accuracy of a phase difference shift detection. We show that this limit can be reached by a measurement having countable outcomes despite the fact that a phase shift can take any value. We show that this is the case of the phase difference operator defined by an optimum phase-shift measurement.


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© 1996 The American Physical Society. A.L. acknowledges the support of a grant from the Dirección General de Investigación Científica y Técnica del Ministerio Español de Educación y Ciencia and the kind hospitality from the Optics Department of the Palacký University.

Uncontrolled Keywords:Optical-phase; Operator; Uncertainty; States; Light
Subjects:Sciences > Physics > Optics
ID Code:32864
Deposited On:27 Aug 2015 07:29
Last Modified:27 Aug 2015 07:29

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