N. Zagury, A. Aragao, J. Casanova, E. Solano
Published 2010-08-11, updated 2011-07-18Version 3
We propose an expansion of the unitary evolution operator, associated to a given Schr\"odinger equation, in terms of a finite product of explicit unitary operators. In this manner, this unitary expansion can be truncated at the desired level of approximation, as shown in the given examples.
Comments: 6 pages, 7 figures. Updated version, minor final changes
Journal: Phys. Rev. A. 82, 042110 (2010)
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