J. Khatibi Moqadam, Renato Portugal, N. F. Svaiter, G. O. Corrêa
We study the effects of imperfections on the fidelity of the Toffoli gate recently realized in a circuit QED setup. The noise is introduced to the interqubits interactions hence the couplings no longer remain constant but belong to the interval [1-d,1+d]J, where J is the average coupling constant and parameter d quantifies the noise level. We consider both static and dynamical imperfections. We also obtain a more robust gate by solving the quantum optimization problem with a modified objective functional including an interval of coupling values rather than a single ideal value.
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http://arxiv.org/abs/1302.6565
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