A comparative code study for quantum fault tolerance

  • Authors:
  • Andrew W. Cross;David P. Divincenzo;Barbara M. Terhal

  • Affiliations:
  • Department of Electrical Engineering and Computer Science, MIT, Cambridge, MA;IBM Research, PO, Yorktown Heights, NY;IBM Research, PO, Yorktown Heights, NY

  • Venue:
  • Quantum Information & Computation
  • Year:
  • 2009

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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.