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Europhysics Letters (EPL)

Optical quantum computation with cavities in the intermediate coupling region

Feng Mei, Ya‐Fei Yu, Xun‐Li Feng, Shi-Liang Zhu, Z. M. Zhang

Published Jul 1, 2010• 23 citations

Abstract

Large-scale quantum computation is currently a hot area of research. The scalable quantum computation scheme with cavities originally proposed by Duan and Kimble ( Phys. Rev. Lett. , 92 (2004) 127902) is further developed here to operate in the intermediate coupling region, which not only greatly relaxes experimental demands on the Purcell factor, but also eliminates the need to consider internal trade-off between cavity quality and efficiency. In our scheme, by controlling the reflectivity of the input single-photon pulse in the cavity, we can realize local atom-photon and nonlocal atom-atom controlled phase-flip (CPF) gates. We also introduce a theoretical model to analyze the performance of our scheme under practical noise. Furthermore, we show that the nonlocal CPF gate can be used to realize a quantum repeater.

DOI: 10.1209/0295-5075/91/10001

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