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Title: Topological quantum computing with a very noisy network and local error rates approaching one percent
Authors: Nickerson, N.H.
Li, Y.
Benjamin, S.C. 
Issue Date: 2013
Citation: Nickerson, N.H., Li, Y., Benjamin, S.C. (2013). Topological quantum computing with a very noisy network and local error rates approaching one percent. Nature Communications 4 : -. ScholarBank@NUS Repository.
Abstract: A scalable quantum computer could be built by networking together many simple processor cells, thus avoiding the need to create a single complex structure. The difficulty is that realistic quantum links are very error prone. A solution is for cells to repeatedly communicate with each other and so purify any imperfections; however prior studies suggest that the cells themselves must then have prohibitively low internal error rates. Here we describe a method by which even error-prone cells can perform purification: groups of cells generate shared resource states, which then enable stabilization of topologically encoded data. Given a realistically noisy network (≥10% error rate) we find that our protocol can succeed provided that intra-cell error rates for initialisation, state manipulation and measurement are below 0.82%. This level of fidelity is already achievable in several laboratory systems. © 2013 Macmillan Publishers Limited. All rights reserved.
Source Title: Nature Communications
ISSN: 20411723
DOI: 10.1038/ncomms2773
Appears in Collections:Staff Publications

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