Superfluidity in many fermion systems: Exact renormalisation group treatment

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dc.creatorKrippa, Boris
dc.date2006-10-18
dc.date.accessioned2026-07-07T10:25:44Z
dc.date.available2026-07-07T10:25:44Z
dc.descriptionThe application of the exact renormalisation group to symmetric as well as asymmetric many-fermion systems with a short-range attractive force is studied. Assuming an ansatz for the effective action with effective bosons, describing pairing effects a set of approximate flow equations for the effective coupling including boson and fermionic fluctuations has been derived. The phase transition to a phase with broken symmetry is found at a critical value of the running scale. The mean-field results are recovered if boson-loop effects are omitted. The calculations with two different forms of the regulator are shown to lead to a similar results. We find that, being quite small in the case of the symmetric many-fermion system the corrections to mean field approximation becomes more important with increasing mass asymmetry.
dc.descriptionTalk given at the IVth International Conference on Quarks and Nuclear Physics (QNP06), Madrid, 5-10 June 2006
dc.identifierhttps://arxiv.org/abs/hep-ph/0610237
dc.identifierhttp://arxiv.org/abs/hep-ph/0610237
dc.identifierEur.Phys.J.A31:734,2007
dc.identifierdoi:10.1140/epja/i2006-10286-2
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/176642
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectSuperconductivity
dc.subjectNuclear Theory
dc.titleSuperfluidity in many fermion systems: Exact renormalisation group treatment
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