Experimental magic state distillation for fault-tolerant quantum computing

Alexandre M. Souza, Jingfu Zhang (), Colm A. Ryan and Raymond Laflamme
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Alexandre M. Souza: Institute for Quantum Computing, University of Waterloo
Jingfu Zhang: Institute for Quantum Computing, University of Waterloo
Colm A. Ryan: Institute for Quantum Computing, University of Waterloo
Raymond Laflamme: Institute for Quantum Computing, University of Waterloo

Nature Communications, 2011, vol. 2, issue 1, 1-5

Abstract: Abstract Any physical quantum device for quantum information processing (QIP) is subject to errors in implementation. In order to be reliable and efficient, quantum computers will need error-correcting or error-avoiding methods. Fault-tolerance achieved through quantum error correction will be an integral part of quantum computers. Of the many methods that have been discovered to implement it, a highly successful approach has been to use transversal gates and specific initial states. A critical element for its implementation is the availability of high-fidelity initial states, such as |0〉 and the 'magic state'. Here, we report an experiment, performed in a nuclear magnetic resonance (NMR) quantum processor, showing sufficient quantum control to improve the fidelity of imperfect initial magic states by distilling five of them into one with higher fidelity.

Date: 2011
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DOI: 10.1038/ncomms1166

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