Quantum nondemolition measurement of the photon number via the optical Kerr effect

N. Imoto, H. A. Haus, and Y. Yamamoto
Phys. Rev. A 32, 2287 – Published 1 October 1985
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Abstract

This paper proposes a quantum nondemolition measurement scheme for the photon number. The signal and probe optical waves interact via the optical Kerr effect. The optical phase of the probe wave is selected as the readout observable for the measurement of the photon number of the signal wave. The measurement accuracy Δn and the imposed phase noise Δφ of the signal wave satisfy Heisenberg’s uncertainty principle with an equality sign, 〈(Δn)2〉〈(Δφ)2〉=(1/4). .AE

  • Received 30 April 1985

DOI:https://doi.org/10.1103/PhysRevA.32.2287

©1985 American Physical Society

Authors & Affiliations

N. Imoto

  • NTT Musashino Electrical Communication Laboratories, Nippon Telegraph and Telephone Corporation, Midori-cho 3-9-11, Musashino-shi, Tokyo 180, Japan

H. A. Haus

  • Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

Y. Yamamoto

  • NTT Musashino Electrical Communication Laboratories, Nippon Telegraph and Telephone Corporation, Midori-cho 3-9-11, Musashino-shi, Tokyo 180, Japan

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Issue

Vol. 32, Iss. 4 — October 1985

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