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arXiv · hep-ph/0407118

Exact renormalization group and many-fermion systems

B. Krippa·M. C. Birse·J. A. McGovern·N. R. Walet
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Abstract

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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B. Krippa, M. C. Birse, J. A. McGovern, N. R. Walet. 2004-07-09. Exact renormalization group and many-fermion systems. https://doi.org/10.1142/s0217751x05021889

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