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arXiv:quant-ph/0703019 · Physical Review A

Linear optical implementation of the two-qubit controlled phase gate with conventional photon detectors

Xu‐Bo Zou, Sheng Li Zhang, Ke Li, Guang‐Can Guo

Published Mar 12, 2007• 42 citations
arXivHTMLPDF

Abstract

We propose a linear optical scheme to implement the nondeterministic two-qubit controlled phase gate with the certain success probability. The proposed setup involves simple linear optical elements, a pair of the two-photon polarization entangled states, and the conventional photon detectors that only distinguish the vacuum and nonvacuum Fock number states. A sophisticated single-photon detector distinguishing one or two photon states is unnecessary. This can greatly simplify the experimental realization of a linear optical quantum computer.

DOI
10.1103/physreva.75.034302

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We propose a linear optical scheme to implement the nondeterministic two-qubit controlled phase gate with the certain success probability. The proposed setup involves simple linear optical elements, a pair of the two-photon polarization entangled states, and the conventional photon detectors that only distinguish the vacuum and nonvacuum Fock number states. A sophisticated single-photon detector distinguishing one or two photon states is unnecessary. This can greatly simplify the experimental realization of a linear optical quantum computer.
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