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A high-efficiency quantum non-demolition single photon number resolving detector
Munro, W. J.; Nemoto, Kae; Beausoleil, R. G.; Spiller, T. P.
Keyword(s): quantum information; quantum optics; quantum non- demolition; photon detector
Abstract: We discuss a new and novel 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 non-demolition measurement with high efficiency (>99%) using only a few hundred atoms, and can distinguish 0, 1 and 2 photons. Notes: Kae Nemoto, National Institute of Informatics, 2-1-2 Hitotsubashi, Chiyoda-ku, Tokyo 101-8430, Japan R. G. Beausoleil, HP Laboratories, 13837 175th Pl., NE, Redmond, WA 98052-2180, USA
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