Linear optics implementation of symmetric matchgates (original) (raw)

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference, 2009

Abstract

Abstract An essential requirement for any quantum computing architecture is the existence of a universal set of quantum gates. Examples of such sets are the 2-qubit CNOT gate in combination with arbitrary 1-qubit gates, and the 3-qubit Toffoli gate together with the 1-qubit Hadamard. A third set, which has not been implemented so far, is Valiant's 2-qubit matchgate G (A, B) which is universal with the SWAP operation. This paper presents how symmetric Valiant gates are decomposed which are sufficient for universal quantum ...

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