Occupation numbers in Self Consistent RPA

Details Occupation numbers in Self Consistent RPA Occupation numbers in Self Consistent RPA

1999-04-30

arxiv.org/abs/nucl-th/9904083v1

Eur.Phys.J. A7 (2000) 155-165

Physics

Nuclear Physics

Nuclear Theory

25 pages, 10 figures, submitted to Nucl. Phys. A

Scientific paper

10.1007/s100500050376

A method is proposed which allows to calculate within the SCRPA theory the occupation numbers via the single particle Green function. This scheme complies with the Hugenholtz van Hove theorem. In an application to the Lipkin model it is found that this prescription gives consistently better results than two other commonly used approximations: lowest order boson expansion and the number operator method.

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