Gates for the Kane Quantum Computer in the Presence of Dephasing

Details Gates for the Kane Quantum Computer in the Presence of Dephasing Gates for the Kane Quantum Computer in the Presence of Dephasing

2004-05-10

arxiv.org/abs/quant-ph/0405042v1

Physics

Quantum Physics

9 pages, 9 figures

Scientific paper

10.1103/PhysRevA.70.022310

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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