Nonclassical moments and their measurement

E. V. Shchukin and W. Vogel
Phys. Rev. A 72, 043808 – Published 12 October 2005

Abstract

Practically applicable criteria for the nonclassicality of quantum states are formulated in terms of different types of moments. For this purpose the moments of the creation and annihilation operators, of two quadratures, and of a quadrature and the photon number operator turn out to be useful. It is shown that all the required moments can be determined by homodyne correlation measurements. An example of a nonclassical effect that is easily characterized by our methods is amplitude-squared squeezing.

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  • Received 3 June 2005
  • Corrected 14 October 2005

DOI:https://doi.org/10.1103/PhysRevA.72.043808

©2005 American Physical Society

Corrections

14 October 2005

Erratum

Authors & Affiliations

E. V. Shchukin* and W. Vogel

  • Arbeitsgruppe Quantenoptik, Fachbereich Physik, Universität Rostock, D-18051 Rostock, Germany

  • *Electronic address: evgeny.shchukin@uni-rostock.de
  • Electronic address: werner.vogel@uni-rostock.de

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Issue

Vol. 72, Iss. 4 — October 2005

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