Nonclassical Moments and their Measurement

Details Nonclassical Moments and their Measurement Nonclassical Moments and their Measurement

2005-06-03

arxiv.org/abs/quant-ph/0506029v2

Phys. Rev. A 72, 043808 (2005)

Physics

Quantum Physics

12 pages, 6 figures

Scientific paper

10.1103/PhysRevA.72.043808

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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