Physics – Atomic Physics
Scientific paper
2010-04-29
Physics
Atomic Physics
Proceedings of International Workshop on New Approaches to High-Tech, NDTCS'2009
Scientific paper
In the present paper by using Mathematica system a symbolic programming method for generation of the expressions of the expansion terms of atomic stationary perturbation theory (PT) is presented. For this purpose, the package named as NCoperators was developed. In producing the PT terms, this package accommodates the features of the Rayleigh-Schr\"odinger perturbation theory (RSPT), the second quantization method (SQR) and angular momentum theory (AMT). The package was built in such a way that it could be applicable in various areas of theoretical atomic spectroscopy. Many functions of the NCoperators can be easily adapted for users to their own demand by easily transforming the functions developed. The package gives a possibility of generating formulas in traditional output form. For some quantities the expressions obtained in Mathematica can be converted into C code. Although the NCoperators package was developed for Unix OS, it can be easily adopted for other OSs if some of the parameters to be changed.
Jursenas Rytis
Merkelis Gintaras
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