Fault tolerance in parity-state linear optical quantum computing

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.022323· OSTI ID:21448470

Hayes, A J. F.; Ralph, T C ^[1]; Haselgrove, H L ^[2]; Gilchrist, Alexei ^[3]

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1. Centre for Quantum Computer Technology and Physics Department, University of Queensland, QLD 4072, Brisbane (Australia)
2. C3I Division, Defence Science and Technology Organisation, Canberra, ACT 2600 (Australia)
3. Physics Department, Macquarie University, Sydney, NSW 2109 (Australia)

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.

• OSTI ID: 21448470
• Journal Information: Physical Review. A, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevA.82.022323; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CORRECTIONS
ERRORS
NOISE
PARITY
QUANTUM COMPUTERS
QUANTUM CRYPTOGRAPHY
QUANTUM MECHANICS
QUANTUM STATES
TOLERANCE
COMPUTERS
CRYPTOGRAPHY
MECHANICS
PARTICLE PROPERTIES