Basis dependence of approximative energy levels in a strongly driven two-level system
Matti Silveri, Jani Tuorila, Mika A. Sillanpää, E. V. Thuneberg, Yuriy Makhlin, Pertti Juhani Hakonen · Journal of Physics Conference Series · 2012
We introduce the diabatic and the adiabatic bases of a strongly driven superconducting two-level system. The multiphoton resonance conditions, the Rabi couplings, and the energy levels are calculated in both bases using the rotating wave approximation, and the results are compared with the corresponding numerical values. We show the basis dependence of the approximate energy levels and deduce the validity regions for both bases. We demonstrate a parameter region where neither of the bases is sufficient for calculations in the rotating wave approximation.