Demonstration of a linear optics controlled-NOT gate
Geoff J. Pryde, Jeremy L. O’Brien, Alexei Gilchrist, Nathan K. Langford, Andrew G. White, Timothy C. Ralph, Daniel F. V. James, David Branning · 2004
We experimentally demonstrate an all-optical quantum gate that, with high fidelity, reproduces the entanglement and truth table of a controlled-NOT. We completely characterize it using quantum process tomography, obtaining an average process fidelity of 0.81.