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Phys Rev Lett. 2006 Jan 20;96(2):020501. Epub 2006 Jan 17.

Noise thresholds for optical quantum computers.

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School of Physical Sciences, The University of Queensland, Queensland 4072, Australia.


In this Letter we numerically investigate the fault-tolerant threshold for optical cluster-state quantum computing. We allow both photon loss noise and depolarizing noise (as a general proxy for all local noise), and obtain a threshold region of allowed pairs of values for the two types of noise. Roughly speaking, our results show that scalable optical quantum computing is possible for photon loss probabilities <3 x 10(-3), and for depolarization probabilities <10(-4).

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