Phys. Rev. C 80, 047301 (2009) [4 pages]Test of finite temperature random-phase approximation on a Lipkin modelReceived 11 August 2009; published 5 October 2009 We investigate the applicability of the 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. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.80.047301
DOI:
10.1103/PhysRevC.80.047301
PACS:
21.60.Jz, 24.30.Cz, 21.10.Pc, 26.30.-k
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