Fault-tolerant quantum computation against biased noise
- 19 November 2008
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 78 (5), 052331
- https://doi.org/10.1103/physreva.78.052331
Abstract
We formulate a scheme for fault-tolerant quantum computation that works effectively against highly biased noise, where dephasing is far stronger than all other types of noise. In our scheme, the fundamental operations performed by the quantum computer are single-qubit preparations, single-qubit measurements, and conditional-phase (CPHASE) gates, where the noise in the CPHASE gates is biased. We show that the accuracy threshold for quantum computation can be improved by exploiting this noise asymmetry; e.g., if dephasing dominates all other types of noise in the CPHASE gates by four orders of magnitude, we find a rigorous lower bound on the accuracy threshold higher by a factor of 5 than for the case of unbiased noise.Keywords
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This publication has 10 references indexed in Scilit:
- Trapped-Ion Quantum Logic Gates Based on Oscillating Magnetic FieldsPhysical Review Letters, 2008
- Asymmetric quantum error correction via code conversionPhysical Review A, 2008
- Efficient one- and two-qubit pulsed gates for an oscillator-stabilized Josephson qubitNew Journal of Physics, 2008
- Fault-Tolerant Quantum Computation with Long-Range Correlated NoisePhysical Review Letters, 2006
- Fault-tolerant architecture for quantum computation using electrically controlled semiconductor spinsNature Physics, 2005
- Quantum computing with realistically noisy devicesNature, 2005
- Universal quantum computation with ideal Clifford gates and noisy ancillasPhysical Review A, 2005
- Fault-tolerant quantum computation for local non-Markovian noisePhysical Review A, 2005
- Methodology for quantum logic gate constructionPhysical Review A, 2000
- Concatenated coding in the presence of dephasingPhysical Review A, 2000