Fault tolerance in parity-state linear optical quantum computing

作者：Hayes A J F^*; Haselgrove H L; Gilchrist Alexei; Ralph T C

来源：Physical Review A, 2010, 82(2): 022323.

DOI：10.1103/PhysRevA.82.022323

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.

• 出版日期2010-8-23