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[Licence| Download | New Version Template] aeqq_v1_0.tar.gz(2099 Kbytes)
Manuscript Title: Spectral: Solving Schrödinger and Wheeler-DeWitt equations in the positive semi-axis by the spectral method
Authors: E.V. Corrêa Silva, G.A. Monerat, G. de Oliveira Neto, L.G. Ferreira Filho
Program title: Spectral
Catalogue identifier: AEQQ_v1_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 185(2014)380
Programming language: Maple, GNU Octave 3.2.4.
Computer: Any supporting Maple.
Operating system: Any supporting Maple.
RAM: About 4 Gbytes
Keywords: Schrödinger equation, Wheeler-DeWitt equation, spectral method.
Classification: 1.9, 4.3, 4.6.

Nature of problem:
Numerical solution of Schrödinger-like eigenvalue equations (specially, the Wheeler-DeWitt equation) in the positive semi-axis.

Solution method:
The unknown wave function is approximated as a linear combination of a suitable set of functions, and the continuous eigenvalue problem is mapped into a discrete (matricial) eigenvalue problem.

Restrictions:
Limitations are due to memory usage only.

Unusual features:
The package may not work properly in older versions of Maple, due to a bug in that CAS; for that reason an interface with the GNU Octave system is provided, requiring no user intervention or Octave programming during calculations.

Running time:
Seconds to hours, depending on number of basis functions used and on the complexity of the potential used.