Fractional Schrödinger Equation in the Presence of the Linear Potential

André Liemert and Alwin Kienle
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André Liemert: Institut für Lasertechnologien in der Medizin und Meßtechnik an der Universität Ulm, Helmholtzstr. 12, D-89081 Ulm, Germany
Alwin Kienle: Institut für Lasertechnologien in der Medizin und Meßtechnik an der Universität Ulm, Helmholtzstr. 12, D-89081 Ulm, Germany

Mathematics, 2016, vol. 4, issue 2, 1-14

Abstract: In this paper, we consider the time-dependent Schrödinger equation: i ? ? ( x , t ) ? t = 1 2 ( ? ? ) ? 2 ? ( x , t ) + V ( x ) ? ( x , t ) , x ? R , t > 0 with the Riesz space-fractional derivative of order 0 < ? ? 2 in the presence of the linear potential V ( x ) = ? x . The wave function to the one-dimensional Schrödinger equation in momentum space is given in closed form allowing the determination of other measurable quantities such as the mean square displacement. Analytical solutions are derived for the relevant case of ? = 1 , which are useable for studying the propagation of wave packets that undergo spreading and splitting. We furthermore address the two-dimensional space-fractional Schrödinger equation under consideration of the potential V ( ? ) = F · ? including the free particle case. The derived equations are illustrated in different ways and verified by comparisons with a recently proposed numerical approach.

Keywords: Riesz fractional derivative; Caputo fractional derivative; Mittag-Leffler matrix function; fractional Schrödinger equation (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2016
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