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DOE OSTI · 21448470

Fault tolerance in parity-state linear optical quantum computing

Hayes, A J. F.·Ralph, T C·Haselgrove, H L·Gilchrist, Alexei
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Abstract

We use a combination of analytical and numerical techniques to calculate the noise threshold and resource requirements for a linear optical quantum computing scheme based on parity-state encoding. Parity-state encoding is used at the lowest level of code concatenation in order to efficiently correct errors arising from the inherent nondeterminism of two-qubit linear-optical gates. When combined with teleported error-correction (using either a Steane or Golay code) at higher levels of concatenation, the parity-state scheme is found to achieve a saving of approximately three orders of magnitude in resources when compared to the cluster state scheme, at a cost of a somewhat reduced noise threshold.

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71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICSCOMPUTERSCORRECTIONSCRYPTOGRAPHYERRORSMECHANICSNOISEPARITYPARTICLE PROPERTIESQUANTUM COMPUTERSQUANTUM CRYPTOGRAPHYQUANTUM MECHANICSQUANTUM STATESTOLERANCE

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Hayes, A J. F., Ralph, T C, Haselgrove, H L, Gilchrist, Alexei. 2010-08-15. Fault tolerance in parity-state linear optical quantum computing. https://doi.org/10.1103/physreva.82.022323

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