Two tricritical lines from a Ginzburg-Landau expansion: application to the LOFF phase

Details Two tricritical lines from a Ginzburg-Landau expansion: application to the LOFF phase Two tricritical lines from a Ginzburg-Landau expansion: application to the LOFF phase

2003-10-10

arxiv.org/abs/hep-ph/0310128v1

Phys.Rev. B69 (2004) 104505

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTex file, 15 pages, 6 figures

Scientific paper

10.1103/PhysRevB.69.104505

We study the behavior of the two plane waves configuration in the LOFF phase close to T=0. The study is performed by using a Landau-Ginzburg expansion up to the eighth order in the gap. The general study of the corresponding grand potential shows, under the assumption that the eighth term in the expansion is strictly positive, the existence of two tricritical lines. This allows to understand the existence of a second tricritical point for two antipodal plane waves in the LOFF phase and justifies why the transition becomes second order at zero temperature. The general analysis done in this paper can be applied to other cases.

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