Strong-coupling theory of two-level atoms in periodic fields
We present a new convergent strong-coupling expansion for two-level atoms in external periodic fields, free of secular terms. As a first application, we show that the coherent destruction of tunneling is a third-order effect. We also present an exact treatment of the high-frequency region, and compare it with the theory of averaging. The qualitative frequency spectrum of the transition probability amplitude contains an effective Rabi frequency.
Barata
JC
Instituto de Fisica, Universidade de Sao Paulo, Caixa Postal 66 318, 05315 970 Sao Paulo SP, Brasil.
Wreszinski
WF