Exact renormalization group and many-fermion systems

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    Abstract

    The exact renormalization group method is applied to many-fermion systems with short-range attractive forces. 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 bosonic fluctations. 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. © World Scientific Publishing Company.
    Original languageEnglish
    Pages (from-to)596-598
    Number of pages2
    JournalInternational Journal of Modern Physics A
    Volume20
    Issue number2-3
    DOIs
    Publication statusPublished - 2005

    Keywords

    • Pairing
    • Phase transition
    • Renormalization group
    • Superfluidity

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