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Physical Review A

Reduced Schrödinger-Coulomb Green’s function for excited states

Gregory S. Adkins, J. Cammerata

Published Feb 1, 1992• 5 citations
Publisher

Abstract

The momentum-space representation of the reduced Schrödinger-Coulomb Green’s function is obtained in closed form for all states n. Explicit forms are given for n=1 and 2.Received 9 August 1991DOI:https://doi.org/10.1103/PhysRevA.45.1314©1992 American Physical Society

DOI
10.1103/physreva.45.1314

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The momentum-space representation of the reduced Schrödinger-Coulomb Green’s function is obtained in closed form for all states n. Explicit forms are given for n=1 and 2.Received 9 August 1991DOI:https://doi.org/10.1103/PhysRevA.45.1314©1992 American Physical Society
The treatment of the time-independent Schrödinger equation in real space is an indispensable part of introductory quantum mechanics. In contrast, the Schrödinger equation in momentum space is an integral equation that is not readily amenable to an analytical solution and is rarely taught. We present a numerical approach to the Schrödinger equation in momentum space. After a suitable discretization process, we obtain the Hamiltonian matrix and diagonalize it numerically. By considering a few examples, we show that this approach is ideal for exploring bound states in a localized potential and complements the traditional (analytical or numerical) treatment of the Schrödinger equation in real space.