Test of finite temperature RPA on a Lipkin model

Details Test of finite temperature RPA on a Lipkin model Test of finite temperature RPA on a Lipkin model

2009-09-18

arxiv.org/abs/0909.3345v1

Phys.Rev.C80:047301,2009

Physics

Nuclear Physics

Nuclear Theory

5 pages, 5 eps figures. To appear in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.80.047301

We investigate the applicability of finite temperature random phase approximation (RPA) using a solvable Lipkin model. We show that the finite temperature RPA reproduces reasonably well the temperature dependence of total strength, both for the positive energy (i.e., the excitation) and the negative energy (i.e., the de-excitation) parts. This is the case even at very low temperatures, which may be relevant to astrophysical purposes.

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