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          Institute: MPI für Gravitationsphysik     Collection: Laser Interferometry & Gravitational Wave Astronomy     Display Documents



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ID: 442834.0, MPI für Gravitationsphysik / Laser Interferometry & Gravitational Wave Astronomy
Experimental test of nonclassicality criteria for phase-diffused squeezed states
Authors:Kiesel, T.; Vogel, W.; Hage, B.; DiGuglielmo, J.; Samblowski, A.; Schnabel, R.
Date of Publication (YYYY-MM-DD):2009-02
Title of Journal:Physical Review A
Volume:79
Issue / Number:2
Sequence Number of Article:022122
Review Status:not specified
Audience:Not Specified
Abstract / Description:We experimentally examine the nonclassical character of a class of non-Gaussian states known as phase-diffused squeezed states. These states may show no squeezing effect at all and therefore provide an interesting example to test nonclassicality criteria. The characteristic function of the Glauber-Sudarshan representation (P function) proves to be a powerful tool to detect nonclassicality. Using this criterion we find that phase-diffused squeezed states are always nonclassical, even if the squeezing effect vanishes. Testing other criteria of nonclassicality based on higher-order squeezing and the positive semidefiniteness of special matrices of normally ordered moments, it is found that these criteria fail to reveal the nonclassicality for some of the prepared phase-diffused squeezed states.
External Publication Status:published
Document Type:Article
Communicated by:Karsten Danzmann
Affiliations:MPI für Gravitationsphysik
Identifiers:ISI:000263815000044 [ID No:1]
ISSN:1050-2947 [ID No:2]
DOI:10.1103/PhysRevA.79.022122
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