Experimental characterization of Gaussian quantum discord generated by four-wave mixing

Experimental characterization of Gaussian quantum discord generated by four-wave mixing

We experimentally determine the quantum discord present in two-mode squeezed vacuum generated by a four-wave mixing process in hot rubidium vapor. The frequency spectra of the discord, as well as the quantum and classical mutual information are also measured. In addition, the effects of symmetric at...

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Veröffentlicht in:arXiv.org 2012-09
Hauptverfasser: Vogl, Ulrich, Glasser, Ryan T, Glorieux, Quentin, Clark, Jeremy B, Corzo-Trejo, Neil, Lett, Paul D
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Attenuation
Four-wave mixing
Frequency spectrum
Physics - Quantum Physics
Rubidium
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Glasser, Ryan T
Glorieux, Quentin
Clark, Jeremy B
Corzo-Trejo, Neil
Lett, Paul D
description We experimentally determine the quantum discord present in two-mode squeezed vacuum generated by a four-wave mixing process in hot rubidium vapor. The frequency spectra of the discord, as well as the quantum and classical mutual information are also measured. In addition, the effects of symmetric attenuation introduced into both modes of the squeezed vacuum on the discord, the quantum mutual information and the classical correlations are examined experimentally. Finally, we show that due to the multi-spatial-mode nature of the four-wave mixing process, the quantum discord may exhibit sub- or superadditivity depending on which spatial channels are selected.
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subjects Attenuation
Four-wave mixing
Frequency spectrum
Physics - Quantum Physics
Rubidium
title Experimental characterization of Gaussian quantum discord generated by four-wave mixing
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