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Quantum nondemolition measurement of photon number in a lossy optical Kerr medium

N. Imoto and S. Saito
Phys. Rev. A 39, 675 – Published 1 January 1989
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Abstract

A photon-number quantum nondemolition (QND) measurement theory that takes dissipative losses into account is presented. A QND measurement criterion is developed to determine the feasibility of QND measurements in a lossy optical medium. Using an analysis based on loss-error characteristics, we examine a lossy Kerr medium. We obtain restrictions on the losses and requirements for the nonlinearity and signal and probe powers necessary to observe the QND effect. We calculate the expected results for an experimental system meeting such requirements. We conclude that QND measurements are possible in existing media.

  • Received 15 July 1988

DOI:https://doi.org/10.1103/PhysRevA.39.675

©1989 American Physical Society

Authors & Affiliations

N. Imoto and S. Saito

  • NTT Basic Research Laboratories, Midori-cho 3-9-11, Musashino-shi, 180 Tokyo, Japan

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Vol. 39, Iss. 2 — January 1989

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