Los puntos clave no están disponibles para este artículo en este momento.
Abstract We prove the existence of a class of two-input, two-output gates any one of which is universal for quantum computation. This is done by explicitly constructing the three-bit gate introduced by Deutsch ( Proc. R. Soc. Lond. A 425, 73 (1989)) as a network consisting of replicas of a single two-bit gate.
Adriano Barenco (Thu,) studied this question.