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  Direct Sampling of Negative Quasiprobabilities of a Squeezed State

Kiesel, T., Vogel, W., Hage, B., & Schnabel, R. (2011). Direct Sampling of Negative Quasiprobabilities of a Squeezed State. Physical Review Letters, 107: 113604. doi:10.1103/PhysRevLett.107.113604.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-03EF-2 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-03F0-B
Genre: Journal Article

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1105.4591 (Preprint), 457KB
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 Creators:
Kiesel, T., Author
Vogel, W., Author
Hage, B.1, Author              
Schnabel, R.1, Author              
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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Free keywords: Quantum Physics, quant-ph
 Abstract: Although squeezed states are nonclassical states, so far, their nonclassicality could not be demonstrated by negative quasiprobabilities. In this work we derive pattern functions for the direct experimental determination of so-called nonclassicality quasiprobabilities. The negativities of these quantities turn out to be necessary and sufficient for the nonclassicality of an arbitrary quantum state and are therefore suitable for a direct and general test of nonclassicality. We apply the method to a squeezed vacuum state of light that was generated by parametric down-conversion in a second-order nonlinear crystal.

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 Dates: 2011-05-232011-09-082011
 Publication Status: Published in print
 Pages: 4 pages, 4 figures, supplementary material added
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 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1105.4591
DOI: 10.1103/PhysRevLett.107.113604
URI: http://arxiv.org/abs/1105.4591
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Title: Physical Review Letters
  Other : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y., etc. : American Physical Society.
Pages: - Volume / Issue: 107 Sequence Number: 113604 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: /journals/resource/954925433406