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A high-efficiency quantum non-demolition single photon number resolving detector

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arxiv quant-ph/0310066 v3 pith:BRNAPIJQ submitted 2003-10-10 quant-ph

classification quant-ph
keywords numberphotondetectornon-demolitionquantumresolvingapproachatoms
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abstract

We discuss a 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 ($\sim$99%) using less than 1600 atoms embedded in a dielectric waveguide.

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