Exact renormalization group and many-fermion systems

Details Exact renormalization group and many-fermion systems Exact renormalization group and many-fermion systems

2004-07-09

arxiv.org/abs/hep-ph/0407118v1

Int.J.Mod.Phys. A20 (2005) 596-598

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk, given by B. Krippa on the International Workshop "Meson2004", Cracow, Poland, 3 pages

Scientific paper

10.1142/S0217751X05021889

The exact renormalization group methods is applied to many fermion systems with short-range attractive force. The strength of the attractive fermion-fermion interaction is determined from the vacuum scattering length. A set of approximate flow equations is derived including fermionic and bosonic fluctuations. The numerical solutions show a phase transition to a gapped phase. The inclusion of bosonic fluctuations is found to be significant only in the small-gap regime.

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