Investigation of two qubit quantum gates in linear optics
Timothy C. Ralph, Nathan K. Langford, T. B. Bell, Jeremy L. O’Brien, Geoff L. Pryde, Andrew G. White, Gerard J Milburn · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2004
We discuss progress towards implementing two qubit quantum gates in optics. We review the operation of an optical quantum gate which performs all the operations of a control-NOT (CNOT) gate in the coincidence basis with two, unentangled photons as the input and discuss its implementation.