 98252 Barata J. C. A.
 On Formal QuasiPeriodic Solutions of the Schroedinger Equation for a
TwoLevel System with a Hamiltonian Depending QuasiPeriodically on
Time
(331K, Postscript)
Apr 1, 98

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Abstract. We consider the Schroedinger equation for a class of twolevel atoms
in a quasiperiodic external field for large coupling, i.e., for which
the energy difference between the unperturbed levels is sufficiently
small. We show that this equation has a solution in terms of a formal
power series, with coefficients which are quasiperiodical functions
of the time, in analogy to the LindstedtPoincare' series in classical
mechanics.
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