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arXiv · 1307.6032

Charge qubit driven via the Josephson nonlinearity

Jani Tuorila·Matti Silveri·Mika Sillanpää·Erkki Thuneberg·Yuriy Makhlin·Pertti Hakonen
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Abstract

We study the novel nonlinear phenomena that emerge in a charge qubit due to the interplay between a strong microwave flux drive and a periodic Josephson potential. We first analyze the system in terms of the linear Landau-Zener-Stückelberg model, and show its inadequacy in a periodic system with several Landau-Zener crossings within a drive period. Experimentally, we probe the quasienergy levels of the driven qubit with an LC-cavity, which requires the use of linear response theory. We also show that our numerical calculations are in good agreement with the experimental data.

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Jani Tuorila, Matti Silveri, Mika Sillanpää, Erkki Thuneberg, Yuriy Makhlin, Pertti Hakonen. 2013-07-23. Charge qubit driven via the Josephson nonlinearity. https://doi.org/10.1088/0953-2048%2F26%2F12%2F124001

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