Experimental demonstration of topological error correction

Xing-Can Yao, Tian-Xiong Wang, Hao-Ze Chen, Wei-Bo Gao, Austin G. Fowler, Robert Raussendorf, Zeng-Bing Chen, Nai-Le Liu, Chao-Yang Lu, You-Jin Deng, Yu-Ao Chen () and Jian-Wei Pan ()
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Xing-Can Yao: Shanghai Branch, University of Science and Technology of China
Tian-Xiong Wang: Shanghai Branch, University of Science and Technology of China
Hao-Ze Chen: Shanghai Branch, University of Science and Technology of China
Wei-Bo Gao: Shanghai Branch, University of Science and Technology of China
Austin G. Fowler: CQC2T, School of Physics, University of Melbourne
Robert Raussendorf: University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
Zeng-Bing Chen: Shanghai Branch, University of Science and Technology of China
Nai-Le Liu: Shanghai Branch, University of Science and Technology of China
Chao-Yang Lu: Shanghai Branch, University of Science and Technology of China
You-Jin Deng: Shanghai Branch, University of Science and Technology of China
Yu-Ao Chen: Shanghai Branch, University of Science and Technology of China
Jian-Wei Pan: Shanghai Branch, University of Science and Technology of China

Nature, 2012, vol. 482, issue 7386, 489-494

Abstract: Abstract Scalable quantum computing can be achieved only if quantum bits are manipulated in a fault-tolerant fashion. Topological error correction—a method that combines topological quantum computation with quantum error correction—has the highest known tolerable error rate for a local architecture. The technique makes use of cluster states with topological properties and requires only nearest-neighbour interactions. Here we report the experimental demonstration of topological error correction with an eight-photon cluster state. We show that a correlation can be protected against a single error on any quantum bit. Also, when all quantum bits are simultaneously subjected to errors with equal probability, the effective error rate can be significantly reduced. Our work demonstrates the viability of topological error correction for fault-tolerant quantum information processing.

Date: 2012
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DOI: 10.1038/nature10770

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