Practical scheme for error control using feedback

Journal Article · Sat May 01 00:00:00 EDT 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.69.052324· OSTI ID:20641137

Sarovar, Mohan; Milburn, Gerard J ^[1]; Ahn, Charlene ^[2]; Jacobs, Kurt ^[3]

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1. Centre for Quantum Computer Technology, and School of Physical Sciences, University of Queensland, St. Lucia, QLD 4072 (Australia)
2. Institute for Quantum Information, California Institute of Technology, Pasadena, California 91125 (United States)
3. Centre for Quantum Computer Technology, Centre for Quantum Dynamics, School of Science, Griffith University, Nathan, QLD 4111 (Australia)

We describe a scheme for quantum-error correction that employs feedback and weak measurement rather than the standard tools of projective measurement and fast controlled unitary gates. The advantage of this scheme over previous protocols [for example, Ahn et al. Phys. Rev. A 65, 042301 (2001)], is that it requires little side processing while remaining robust to measurement inefficiency, and is therefore considerably more practical. We evaluate the performance of our scheme by simulating the correction of bit flips. We also consider implementation in a solid-state quantum-computation architecture and estimate the maximal error rate that could be corrected with current technology.

• OSTI ID: 20641137
• Journal Information: Physical Review. A, Vol. 69, Issue 5; Other Information: DOI: 10.1103/PhysRevA.69.052324; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CONTROL
CORRECTIONS
DATA PROCESSING
ERRORS
FEEDBACK
IMPLEMENTATION
INFORMATION THEORY
PERFORMANCE
QUANTUM MECHANICS