Entanglement-Enhanced Measurement of a Completely Unknown Phase

D. W. Berry; G. Y. Xiang; B. L. Higgins; H. M. Wiseman; G. J. Pryde

doi:10.1364/QELS.2010.QThJ5

Conference on Lasers and Electro-Optics 2010
OSA Technical Digest (CD) (Optica Publishing Group, 2010),
paper QThJ5
•https://doi.org/10.1364/QELS.2010.QThJ5

Entanglement-Enhanced Measurement of a Completely Unknown Phase

D. W. Berry, G. Y. Xiang, B. L. Higgins, H. M. Wiseman, and G. J. Pryde

Quantum Electronics and Laser Science Conference 2010

San Jose, California United States
16–21 May 2010
ISBN: 978-1-55752-889-6

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Quantum Coherence and Entanglement (QThJ)

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D. W. Berry, G. Y. Xiang, B. L. Higgins, H. M. Wiseman, and G. J. Pryde, "Entanglement-Enhanced Measurement of a Completely Unknown Phase," in Conference on Lasers and Electro-Optics 2010, OSA Technical Digest (CD) (Optica Publishing Group, 2010), paper QThJ5.

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Abstract

We demonstrate a method for achieving phase measurements with accuracy beyond the standard quantum limit using entangled states. A sophisticated feedback scheme means that no initial estimate of the phase is required.

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