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Quantum optics

Multicolour entanglement

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The entanglement of squeezed light beams is critical for quantum optical applications, but has so far been achieved with only two light beams. Now, researchers have surpassed this restriction and achieved entanglement with three beams of different colours. They also report a finite loss level for disentanglement of one beam from the other two.

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Figure 1: Schematic of the experiment.

© 2009 AAAS

Figure 2: Finite-loss-induced disentanglement of the pump beam with the signal and idler beams.

© 2009 AAAS

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Authors and Affiliations

  1. Joseph H. Eberly and John C. Howell are at the Department of Physics and Astronomy, University of Rochester, 600 Wilson Blvd., Rochester, New York 14627, USA. eberly@pas.rochester.edu; howell@pas.rochester.edu,

    Joseph H. Eberly & John C. Howell

  2. howell@pas.rochester.edu,

    Joseph H. Eberly & John C. Howell

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  1. Joseph H. Eberly
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  2. John C. Howell
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Eberly, J., Howell, J. Multicolour entanglement. Nature Photon 4, 12–13 (2010). https://doi.org/10.1038/nphoton.2009.244

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