Error Correction and Degeneracy in Surface Codes Suffering Loss

Details Error Correction and Degeneracy in Surface Codes Suffering Loss Error Correction and Degeneracy in Surface Codes Suffering Loss

2009-12-07

arxiv.org/abs/0912.1159v1

Physics

Quantum Physics

12 pages, 10 figures, comments welcome

Scientific paper

Many proposals for quantum information processing are subject to detectable loss errors. In this paper, we give a detailed account of recent results in which we showed that topological quantum memories can simultaneously tolerate both loss errors and computational errors, with a graceful tradeoff between the threshold for each. We further discuss a number of subtleties that arise when implementing error correction on topological memories. We particularly focus on the role played by degeneracy in the matching algorithms, and present a systematic study its effects on thresholds. We also discuss some of the implications of degeneracy for estimating phase transition temperatures in the random bond Ising model.

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