Controlled-NOT gate operating with single photons

  title={Controlled-NOT gate operating with single photons},
  author={Matthew A. Pooley and David J. P. Ellis and Raj B. Patel and Anthony J. Bennett and K. H. A. Chan and Ian Farrer and David A. Ritchie and Andrew J. Shields},
  journal={Applied Physics Letters},
The initial proposal for scalable optical quantum computing required single photon sources, linear optical elements such as beamsplitters and phaseshifters, and photon detection. Here, we demonstrate a two qubit gate using indistinguishable photons from a quantum dot in a pillar microcavity. As the emitter, the optical circuitry, and the detectors are all semiconductor, this is a promising approach towards creating a fully integrated device for scalable quantum computing. 

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