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arXiv · 0912.1493

Improving noise threshold for optical quantum computing with the EPR photon source

Z. -H. Wei·Y. -J. Han·C. H. OH·L. -M. Duan
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Abstract

We show that the noise threshold for optical quantum computing can be significantly improved by using the EPR-type of photon source. In this implementation, the detector efficiency $η_{d}$ is required to be larger than 50%, and the source efficiency $η_{s}$ can be an arbitrarily small positive number. This threshold compares favorably with the implementation using the single-photon source, where one requires the combined efficiency $η_{d}η_{s}>2/3$. We discuss several physical setups for realization of the required EPR photon source, including the photon emitter from a single-atom cavity.

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Z. -H. Wei, Y. -J. Han, C. H. OH, L. -M. Duan. 2009-12-08. Improving noise threshold for optical quantum computing with the EPR photon source. https://doi.org/10.1103/physreva.81.060301

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