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Use of an electronic computer for the construction of exact eigenfunctions of orbital angular momentum in L-S coupling

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Il Nuovo Cimento (1955-1965)

Summary

The application of a digital electronic computer to the evaluation of exact eigenfunctions of total orbital angular momentum for many-electrons systems is studied. Some unusual features presented by such problem, as compared with ordinary applications of electronic computers, are discussed. Computations have been carried out following the projection operator tecnique, and results are given for 3 and 4 electrons ind- andf-states, and for 5 electrons ind-states only. Because of the relative smallness of the computer used, results are not complete; the way followed, however, appears to be quite promising for future extensions of the computation with a bigger machine.

Riassunto

Si studia l’applicazione di una calcolatrice elettronica numerica al calcolo delle autofunzioni esatte del momento angolare orbitale totale per sistemi di più elettroni. Vengono discussi alcuni aspetti particolari che il problema presenta in confronto alle applicazioni usuali delle calcolatrici elettroniche. I calcoli sono stati condotti col metodo dell’operatore di proiezione; si danno risultati per 3 e 4 elettronid ef, e per 5 elettronid. Poichè la calcolatrice usata era relativamente piccola, i risultati non sono completi; la via seguita sembra però promettente in vista di future estensioni del calcolo con una macchina più grande.

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Abate, E., Fabri, E. Use of an electronic computer for the construction of exact eigenfunctions of orbital angular momentum in L-S coupling. Nuovo Cim 14, 29–47 (1959). https://doi.org/10.1007/BF02725003

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  • DOI: https://doi.org/10.1007/BF02725003

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