Physics – Quantum Physics
Scientific paper
2010-05-07
Phys. Rev. A 81, 052303 (2010) http://link.aps.org/doi/10.1103/PhysRevA.81.052303
Physics
Quantum Physics
5 pages, 2 figures
Scientific paper
10.1103/PhysRevA.81.052303
We propose a scheme for efficient cluster state quantum computation by using imperfect polarization-entangled photon-pair sources, linear optical elements and inefficient non-photon-number-resolving detectors. The efficiency threshold for loss tolerance in our scheme requires the product of source and detector efficiencies should be >1/2 - the best known figure. This figure applies to uncorrelated loss. We further find that the loss threshold is unaffected by correlated loss in the photon pair source. Our approach sheds new light on efficient linear optical quantum computation with imperfect experimental conditions.
Gong Yan-Xiao
Guo Guang-Can
Ralph Timothy C.
Zhu Shi-Ning
Zou Xu-Bo
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