Applied Physics B

, Volume 55, Issue 3, pp 291–297

Quantum non-demolition measurements in optics: a review and some recent experimental results

  • J. F. Roch
  • G. Roger
  • P. Grangier
  • J.-M. Courty
  • S. Reynaud
Applications

DOI: 10.1007/BF00325017

Cite this article as:
Roch, J.F., Roger, G., Grangier, P. et al. Appl. Phys. B (1992) 55: 291. doi:10.1007/BF00325017
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Abstract

We review the schemes which have been implemented, in order to achieve quantum non-demolition (QND) measurements in the optical domain. The simplest schemes can be obtained using the optical Kerr effect, which yields a crossed-phase modulation coupling between two light beams. Other schemes use either independently generated squeezed light, or coupled-mode parametric amplifiers. These various schemes can be characterized using three criteria, which describe, respectively, the quality of the quantum measurement, the non-destruction of the signal, and the conditional variance of the output signal beam, given the output “meter” beam (quantum-state preparation criterion). We show that quantitative limits can be defined with respect to these criteria, delimiting “classical” and “quantum” domains of operation. Then we present in more detail a new experimental implementation of QND measurements, using three-level atoms inside a doubly-resonant optical cavity.

PACS

42.50.Dv 42.50.Lc 03.65.Bz 

Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • J. F. Roch
    • 1
  • G. Roger
    • 1
  • P. Grangier
    • 1
  • J.-M. Courty
    • 2
  • S. Reynaud
    • 2
  1. 1.Institut d'OptiqueOrsay CédexFrance
  2. 2.Laboratoire de Spectroscopie HertzienneParis CédexFrance

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