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Proceedings Paper

A decoherent limit of fault-tolerant quantum computation driven by coherent fields
Author(s): Li Yang; Yufu Chen
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Paper Abstract

Based on amplitude character of quantum Rabi oscillation driven by coherent field we show that there exists an upper bound to logic complexity of quantum circuit. We introduce a parameter called single-qubit logic complexity and estimate its decoherence limit in a reasonable case. The analysis show that a generally accepted constant threshold of the threshold theorem limits the logic complexity to so small a number that even a typical construction of fault-tolerant quantum Toffoli gate can hardly be implemented reliably. This result suggests that the construction of feasible fault-tolerant quantum gates is still an arduous task.

Paper Details

Date Published: 11 January 2008
PDF: 6 pages
Proc. SPIE 6827, Quantum Optics, Optical Data Storage, and Advanced Microlithography, 682708 (11 January 2008); doi: 10.1117/12.755948
Show Author Affiliations
Li Yang, Graduate Univ. of the Chinese Academy of Sciences (China)
Yufu Chen, Graduate Univ. of the Chinese Academy of Sciences (China)

Published in SPIE Proceedings Vol. 6827:
Quantum Optics, Optical Data Storage, and Advanced Microlithography
Chris A. Mack; Guangcan Guo; Guofan Jin; Song-hao Liu; Kees A. Schouhamer Immink; Jinfeng Kang; Jun-en Yao; Keiji Shono; Osamu Hirota, Editor(s)

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