Experimental Demonstration of Coherent State Estimation with Minimal Disturbance

Ulrik L. Andersen, Metin Sabuncu, Radim Filip, and Gerd Leuchs
Phys. Rev. Lett. 96, 020409 – Published 20 January 2006

Abstract

We investigate the optimal trade-off between information gained about an unknown coherent state and the state disturbance caused by the measurement process. We propose several optical schemes that can enable this task, and we implement one of them, a scheme that relies on only linear optics and homodyne detection. Experimentally we reach near optimal performance, limited only by detection inefficiencies. In addition, we show that such a scheme can be used to enhance the transmission fidelity of a class of noisy channels.

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  • Received 28 October 2005

DOI:https://doi.org/10.1103/PhysRevLett.96.020409

©2006 American Physical Society

Authors & Affiliations

Ulrik L. Andersen1,*, Metin Sabuncu1, Radim Filip1,2, and Gerd Leuchs1

  • 1Institut für Optik, Information und Photonik, Max-Planck Forschungsgruppe, Universität Erlangen-Nürnberg, Günther-Scharowsky strasse 1, 91058, Erlangen, Germany
  • 2Department of Optics, Research Center for Optics, Palacky University, 17. Listopadu 50, 77200 Olomouc, Czech Republic

  • *Electronic address: andersen@kerr.physik.uni-erlangen.de

See Also

Realization of a Minimal Disturbance Quantum Measurement

F. Sciarrino, M. Ricci, F. De Martini, R. Filip, and L. Mišta, Jr.
Phys. Rev. Lett. 96, 020408 (2006)

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Vol. 96, Iss. 2 — 20 January 2006

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