%0 Journal Article
%T Feedback iterative decoding of sparse quantum codes<br>量子稀疏图码的反馈式迭代译码
%A Wang Yun-Jiang
%A Bai Bao-Ming
%A Wang Xin-Mei
%A <br>王云江
%A 白宝明
%A 王新梅
%J 物理学报
%D 2010
%I 
%X Decoding sparse quantum codes can be accomplished by syndrome-based decoding through using the sum-product algorithm (SPA). We significantly improve this decoding scheme by developing a new feedback adjustment strategy for the standard SPA. In our feedback strategy, we exploit not only the syndrome but also the values of the frustrated checks on individual qubits of the code and the channel model. Consequently, our decoding algorithm, on the one hand, can break the symmetric degeneracy, and on the other hand, can feed back more useful information to the SPA decoder to help the decoder determine a valid output, thereby significantly improving the decoding ability of the decoder. Moreover, our algorithm does not increase the measurement complexity compared with the previous method, but takes full advantage of the measured information.
%K sparse quantum codes
%K sum-product algorithm
%K quantum error-correcting codes
%K quantum information<br>量子稀疏图码
%K 和积算法
%K 量子纠错码
%K 量子信息
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=E39CAEF33FD76A0E1F3A6750A31F9617&yid=140ECF96957D60B2&vid=6AC2A205FBB0EF23&iid=708DD6B15D2464E8&sid=3AADECC0246F44FB&eid=6A72057EFC9E1E97&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=14