Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Test of finite temperature RPA on a Lipkin model   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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The categories of this paper are: acc-phys
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
2
The categories of this paper are: math
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The categories of this paper are: funct-an
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The categories of this paper are: quant-ph
3
The categories of this paper are: physics
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The categories of this paper are: adap-org
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The categories of this paper are: dg-ga
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The categories of this paper are: math-ph