Abstract

We investigate the Floquet states and quasienergies of a two-level quantum system driven by a high-frequency driving field. This quantum system is mapped onto a classical one in a function transformation. The Floquet states and quasienergies are calculated in a multiple scale expansion in the inverse of the frequency (ω) to order ω−2. It is shown that the coherent destruction of tunnelling is a second-order effect.

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