05-59 M. Dimassi, J.-C. Guillot, J. Ralston
Gaussian Beam Construction for Adiabatic Perturbations (264K, Postscript) Feb 9, 05
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Abstract. By the gaussian beam method, we construct nontrivial asymptotic solutions over arbitrarily long time intervals for the slowly perturbed periodic Schr\"odinger operator.

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