Critical phenomena and renormalization-group flow of multi-parameter Φ^4 field theories

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dc.creatorVicari, Ettore
dc.date2007-09-07
dc.date2007-09-17
dc.date.accessioned2026-07-07T13:02:43Z
dc.date.available2026-07-07T13:02:43Z
dc.descriptionIn the framework of the renormalization-group (RG) approach, critical phenomena can be investigated by studying the RG flow of multi-parameter $Φ^4$ field theories with an $N$-component fundamental field, containing up to 4th-order polynomials of the field. Some physically interesting systems require $Φ^4$ field theories with several quadratic and quartic parameters, depending essentially on their symmetry and symmetry-breaking pattern at the transition. Results for their RG flow apply to disorder and/or frustrated systems, anisotropic magnetic systems, density wave models, competing orderings giving rise to multicritical behaviors. The general properties of the RG flow in multi-parameter $Φ^4$ field theories are discussed. An overview of field-theoretical results for some physically interesting cases is presented, and compared with other theoretical approaches and experiments. Finally, this RG approach is applied to investigate the nature of the finite-temperature transition of QCD with $N_f$ light quarks.
dc.description22 pages, Plenary talk at the XXV International Symposium on Lattice Field Theory, July 30 - August 4 2007, Regensburg, Germany
dc.identifierhttps://arxiv.org/abs/0709.1014
dc.identifierhttp://arxiv.org/abs/0709.1014
dc.identifierPoSLAT2007:023,2007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/226538
dc.subjectHigh Energy Physics - Lattice
dc.subjectStatistical Mechanics
dc.subjectHigh Energy Physics - Theory
dc.titleCritical phenomena and renormalization-group flow of multi-parameter Φ^4 field theories
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