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Manuscript Title: A program for performing a numerical integration of the Schroedinger
equation. | ||

Authors: C. Foglia | ||

Program title: DIFEQ | ||

Catalogue identifier: ACCC_v1_0Distribution format: gz | ||

Journal reference: Comput. Phys. Commun. 32(1984)209 | ||

Programming language: Fortran. | ||

Computer: CDC 7600. | ||

Operating system: SCOPE 2. | ||

Word size: 6 | ||

Keywords: General purpose, Second order Differential equation, Schrodinger equation, Boundary value problem. | ||

Classification: 4.3. | ||

Nature of problem:Differential equations of the form psi''(x) + (lambda-V(x))psi(x)=0, x in range (a,b) with boundary conditions psi(a)=psi(b)=0 are solved. The main purpose of this paper is to present a perturbative procedure for the calculations of approximate eigenvalues of the Schroedinger equation. | ||

Solution method:The differential equation is solved by the method described in [1] and summarized in the long write-up. | ||

Unusual features:The steplengths used in solving the differential equation are automatically adjusted by the program in accordance with the accuracy conditions supplied by the user. | ||

Running time:Test run which accompanies this paper .994s to compile and 0.74s to execute. |

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