@Article{Blanes_etal2010,
author="Blanes, S.
and Casas, F.
and Oteo, J. A.
and Ros, J.",
title="A pedagogical approach to the Magnus expansion",
journal="European Journal of Physics",
year="2010",
publisher="Iop Publishing Ltd",
volume="31",
number="4",
pages="907--918",
abstract="Time-dependent perturbation theory as a tool to compute approximate solutions of the Schrodinger equation does not preserve unitarity. Here we present, in a simple way, how the Magnus expansion (also known as exponential perturbation theory) provides such unitary approximate solutions. The purpose is to illustrate the importance and consequences of such a property. We suggest that the Magnus expansion may be introduced to students in advanced courses of quantum mechanics.",
optnote="ISI:000279393800024",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=259), last updated on Thu, 17 Feb 2011 12:19:38 +0000",
issn="0143-0807",
doi="10.1088/0143-0807/31/4/020",
opturl="https://doi.org/10.1088/0143-0807/31/4/020",
language="English"
}