A decoherent limit of fault-tolerant quantum computation driven by coherent fields

Li Yang; Yufu Chen

doi:10.1117/12.755948

11 January 2008 A decoherent limit of fault-tolerant quantum computation driven by coherent fields

Li Yang, Yufu Chen

Proceedings Volume 6827, Quantum Optics, Optical Data Storage, and Advanced Microlithography; 682708 (2008) https://doi.org/10.1117/12.755948
Event: Photonics Asia 2007, 2007, Beijing, China

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.

Citation Download Citation

Li Yang and Yufu Chen "A decoherent limit of fault-tolerant quantum computation driven by coherent fields", Proc. SPIE 6827, Quantum Optics, Optical Data Storage, and Advanced Microlithography, 682708 (11 January 2008); https://doi.org/10.1117/12.755948

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