A comparative code study for quantum fault tolerance
Andrew W. Cross (Massachusetts Institute of Technology)
David P. Divincenzo (IBM Research)
Barbara M. Terhal (IBM Research)
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Abstract
We study a comprehensive list of quantum codes as candidates for codes used at the physical level in a fault-tolerant code architecture. Using the Aliferis-Gottesman-Preskill (AGP) ex-Rec method we calculate the pseudo-threshold for these codes against depolarizing noise at various levels of overhead. We estimate the logical noise rate as a function of overhead at a physical error rate of p0 = 1 × 10-4. The Bacon-Shor codes and the Golay code are the best performers in our study.
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