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Type: Artigo de periódico
Title: A modified time-dependent perturbation approach to quantum dynamics and its application to relaxation phenomena in magnetic molecules
Author: Dartora, CA
Cabrera, GG
Nobrega, KZ
Abstract: We introduce a modified version of the interaction picture applicable to situations in which the nonperturbed Hamiltonian is time-dependent but can be diagonalized by the same basis of states at all times. We probe the method using a simple model Hamiltonian to study the spin dynamics of molecular magnets with time-dependent fields. Fully quantum mechanical calculations show the superiority. of our method compared to the usual time-dependent perturbation theory. Our approach takes into account time-dependent fields and converges rapidly to the exact solution. (C) 2009 American Association of Physics Teachers. [DOI: 10.1119/1.3133088]
Country: EUA
Editor: Amer Assoc Physics Teachers Amer Inst Physics
Rights: aberto
Identifier DOI: 10.1119/1.3133088
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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