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Phys. Rev. A 68, 012104 (2003) [7 pages]

Nonlocality of two-mode squeezing with internal noise

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Sonja Daffer1, Krzysztof Wódkiewicz1,2, and John K. McIver1
1Department of Physics and Astronomy, University of New Mexico, 800 Yale Boulevard NE, Albuquerque, New Mexico 87131, USA
2Instytut Fizyki Teoretycznej, Uniwersytet Warszawski, Hoża 69, Warszawa 00-681, Poland

Received 13 February 2003; published 15 July 2003

We examine the quantum states produced through parametric amplification with internal quantum noise. The internal diffusion arises by coupling both modes of light to a reservoir for the duration of the interaction time. The Wigner function for the diffused two-mode squeezed state is calculated. The nonlocality, separability, and purity of these quantum states of light are discussed. In addition, we conclude by studying the nonlocality of two other continuous-variable states: the Werner state and the phase-diffused state for two light modes.


©2003 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.68.012104
DOI: 10.1103/PhysRevA.68.012104
PACS: 03.65.Ud, 42.50.Dv, 42.65.Lm

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