A pedagogical approach to the Magnus expansion
comunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7037
comunitat-uji-handle3:10234/8635
comunitat-uji-handle4:
INVESTIGACIONMetadatos
Título
A pedagogical approach to the Magnus expansionFecha de publicación
2010-07Editor
Institute of PhysicsISSN
0143-0807; 1361-6404Cita bibliográfica
European journal of physics (July 2010), vol. 31, no. 4, 276-298Tipo de documento
info:eu-repo/semantics/articleVersión
info:eu-repo/semantics/sumittedVersionPalabras clave / Materias
Resumen
Time-dependent perturbation theory as a tool to compute approximate solutions of the Schrödinger equation does not preserve unitarity. Here we present, in a simple way, how the Magnus expansion (also known as exponential ... [+]
Time-dependent perturbation theory as a tool to compute approximate solutions of the Schrödinger 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 [-]
Derechos de acceso
© 2010 Institute of Physics
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info:eu-repo/semantics/openAccess
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