Fault-tolerant error correction with the gauge color code

Benjamin J. Brown (), Naomi H. Nickerson and Dan E. Browne ()
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Benjamin J. Brown: Niels Bohr International Academy, Niels Bohr Institute
Naomi H. Nickerson: Quantum Optics and Laser Science, Blackett Laboratory, Imperial College London
Dan E. Browne: University College London

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract The constituent parts of a quantum computer are inherently vulnerable to errors. To this end, we have developed quantum error-correcting codes to protect quantum information from noise. However, discovering codes that are capable of a universal set of computational operations with the minimal cost in quantum resources remains an important and ongoing challenge. One proposal of significant recent interest is the gauge color code. Notably, this code may offer a reduced resource cost over other well-studied fault-tolerant architectures by using a new method, known as gauge fixing, for performing the non-Clifford operations that are essential for universal quantum computation. Here we examine the gauge color code when it is subject to noise. Specifically, we make use of single-shot error correction to develop a simple decoding algorithm for the gauge color code, and we numerically analyse its performance. Remarkably, we find threshold error rates comparable to those of other leading proposals. Our results thus provide the first steps of a comparative study between the gauge color code and other promising computational architectures.

Date: 2016
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DOI: 10.1038/ncomms12302

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