For high wave numbers, the Helmholtz equation su!ers the so-called &pollution e!ect'. This e!ect is directly related to the dispersion. A method to measure the dispersion on any numerical method related to the classical Galerkin FEM is presented. This method does not require to compute the numerical
Oscillators in one and two dimensions and ladder operators for the Morse and Coulomb problems
✍ Scribed by H. N. Núñez-Yépez; J. L. López-Bonilla; D. Navarrete; A. L. Salas-Brito
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 147 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0020-7608
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✦ Synopsis
We exhibit that the radial eigenfunctions of a 2D-harmonic oscillator 2DHO may be Ž . regarded as 1D-harmonic oscillator 1DHO matrix elements. From this simple fact and using as a starting point the ladder operators a " for 1DHO, we obtain ladder operators for 2DHO. Furthermore, by using the relationship between the Coulomb and Morse problems with a 2DHO, we are able to obtain the ladder operators for the former problems without explicitly recurring to the factorization method. Some uses of the technique presented are suggested.
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