Abstract
A general protocol for constructing a complete efficient encoding and decoding quantum circuit of the [[8,3,5]] stabilizer code is proposed. The [[8,3,5]] stabilizer code is an eight-qubit code that protects a three-qubit state with up to one error, which is very important for quantum information processing. Single-qubit operations, two-qubit controlled gates and Toffoli gates are required in the proposed circuit. The current protocol can be generalized to all quantum stabilizer codes satisfying quantum Hamming bound, and implemented in some quantum systems.
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Acknowledgements
This work is supported by National Natural Science Foundation of China (NSFC) under Grant Nos:11005029, 10905024 and 61073048, China Postdoctoral Science Foundation under Grant No. 2011M501373, the Natural Science Foundation of Anhui Province under Grant No. 10040606Q51, the Key Program of the Education Department of Anhui Province under Grant Nos. KJ2011A242, KJ2010ZD08, the Talent Foundation of Anhui Province under Grant No. 2009Z022, the Key Program of Research Base of Hefei Normal University under Grant No. 2012jd13.
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Appendix: Construction of the Code Words of the [[8, 3, 5]] Stabilizer Code
Appendix: Construction of the Code Words of the [[8, 3, 5]] Stabilizer Code
According to Eq. (3), M 5 has no effect on the generation of the quantum code word of [[8,3,5]] stabilizer code, thus the term (1+M 5) can be eliminated, the code word of the [[8,3,5]] stabilizer code can be reduced as
Then, we combine Eqs. (6) with (3), the detailed code words of the [[8,3,5]] can be listed as following
According to the above equations, the encoding rule of the [[8,3,5]] stabilizer code can be reduced to
where m=c 2⊕c 3, \(\overline{m}=n=\overline{c_{2}\oplus c_{3}}\), \(a=(-1)^{c_{1}}\) and \(b=(-1)^{\overline{c}_{1}}\).
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Dong, P., Liu, J. & Cao, ZL. Efficient Quantum Circuit for Encoding and Decoding of the [[8,3,5]] Stabilizer Code. Int J Theor Phys 52, 1274–1281 (2013). https://doi.org/10.1007/s10773-012-1442-x
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DOI: https://doi.org/10.1007/s10773-012-1442-x