Experimental Controlled-NOT Logic Gate for Single Photons in the Coincidence Basis

Abstract

We report a proof-of-principle demonstration of a probabilistic controlled-NOT gate for single photons. Single-photon control and target qubits were mixed with a single ancilla photon in a device constructed using only linear optical elements. The successful operation of the controlled-NOT gate relied on post-selected three-photon interference effects which required the detection of the photons in the output modes.

4 pages, 4 figures; minor changes

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