%0 Journal Article
%T High-fidelity operation of quantum photonic circuits
%A Anthony Laing
%A Alberto Peruzzo
%A Alberto Politi
%A Maria Rodas Verde
%A Matthaeus Halder
%A Timothy C. Ralph
%A Mark G. Thompson
%A Jeremy L. O'Brien
%J Physics
%D 2010
%I arXiv
%R 10.1063/1.3497087
%X We demonstrate photonic quantum circuits that operate at the stringent levels that will be required for future quantum information science and technology. These circuits are fabricated from silica-on-silicon waveguides forming directional couplers and interferometers. While our focus is on the operation of quantum circuits, to test this operation required construction of a spectrally tuned photon source to produce near-identical pairs of photons. We show non-classical interference with two photons and a two-photon entangling logic gate that operate with near-unit fidelity. These results are a significant step towards large-scale operation of photonic quantum circuits.
%U http://arxiv.org/abs/1004.0326v2