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Squeezing more from a quantum nondemolition measurement

Ben C. Buchler, Ping Koy Lam, Hans-A. Bachor, Ulrik L. Andersen, and Timothy C. Ralph
Phys. Rev. A 65, 011803(R) – Published 13 December 2001
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Abstract

We use a stable, 5 dB, amplitude squeezed source for a quantum nondemolition (QND) experiment. The performance of our QND system is enhanced by an electro-optic feedforward loop which improves the signal transfer efficiency. At best, we measure a total signal transfer of 1.81 and conditional variance of 0.55.

  • Received 29 August 2001

DOI:https://doi.org/10.1103/PhysRevA.65.011803

©2001 American Physical Society

Authors & Affiliations

Ben C. Buchler*, Ping Koy Lam, and Hans-A. Bachor

  • Department of Physics, Faculty of Science, Australian National University, ACT 0200, Australia

Ulrik L. Andersen

  • Department of Physics, Faculty of Science, Australian National University, ACT 0200, Australia
  • Department of Physics, Technical University of Denmark, DK-2800 Lyngby, Denmark

Timothy C. Ralph

  • Department of Physics, University of Queensland, Queensland 4072, Australia

  • *Electronic address: ben.buchler@anu.edu.au

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Vol. 65, Iss. 1 — January 2002

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