The average effective interaction in linked cluster theory
1975; Elsevier BV; Volume: 243; Issue: 1 Linguagem: Inglês
10.1016/0375-9474(75)90021-4
ISSN1873-1554
AutoresPhilip R. Goode, Daniel S. Koltun,
Tópico(s)Advanced Chemical Physics Studies
ResumoWe derive a theoretical method for calculating the averages (over J and T) of matrix elements of the nuclear effective interaction, in any order of the linked cluster expansion. We apply this to calculate all terms through fourth order in the G-matrix, for the averages in mass-6 and mass-18 nuclei. We find that the averages in fourth order are as large as in second and third order. This behavior is associated with a small number of terms, which suggests a partial summation method of improving the series. The relation to other work is discussed.
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