A practical scheme for error control using feedback

Details A practical scheme for error control using feedback A practical scheme for error control using feedback

2004-02-03

arxiv.org/abs/quant-ph/0402017v2

Phys. Rev. A 69, 052324 (2004)

Physics

Quantum Physics

12 pages, 3 figures. Minor typographic changes

Scientific paper

10.1103/PhysRevA.69.052324

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, PRA, 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 which could be corrected with current technology.

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