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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|
|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]|
|Editor:||Amer Assoc Physics Teachers Amer Inst Physics|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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