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Gates for the Kane Quantum Computer in the Presence of Dephasing

Charles D. Hill·Hsi-Sheng Goan
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Abstract

In this paper we investigate the effect of dephasing on proposed quantum gates for the solid-state Kane quantum computing architecture. Using a simple model of the decoherence, we find that the typical error in a CNOT gate is $8.3 \times 10^{-5}$. We also compute the fidelities of Z, X, Swap, and Controlled Z operations under a variety of dephasing rates. We show that these numerical results are comparable with the error threshold required for fault tolerant quantum computation.

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Charles D. Hill, Hsi-Sheng Goan. 2004-05-10. Gates for the Kane Quantum Computer in the Presence of Dephasing. https://doi.org/10.1103/physreva.70.022310

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