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Phys. Rev. A 71, 033819 (2005) [4 pages]

High-efficiency quantum-nondemolition single-photon-number-resolving detector

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W. J. Munro1,2,*, Kae Nemoto2,†, R. G. Beausoleil3, and T. P. Spiller1
1Hewlett-Packard Laboratories, Filton Road, Stoke Gifford, Bristol BS34 8QZ, United Kingdom
2National Institute of Informatics, 2-1-2 Hitotsubashi, Chiyoda-ku, Tokyo 101-8430, Japan
3Hewlett-Packard Laboratories, 13837 175th Place NE, Redmond, Washington 98052-2180, USA

Received 11 October 2003; published 31 March 2005

We discuss an approach to the problem of creating a photon-number-resolving detector using the giant Kerr nonlinearities available in electromagnetically induced transparency. Our scheme can implement a photon-number quantum-nondemolition measurement with high efficiency (∼99%) using fewer than 1600 atoms embedded in a dielectric waveguide.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.71.033819
DOI:
10.1103/PhysRevA.71.033819
PACS:
42.50.−p, 03.67.Lx, 32.80.−t, 85.60.Gz

*Electronic address: bill.munro@hp.com

†Electronic address: nemoto@nii.ac.jp

 
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