Functional Integral approach to quasi-particles in Fermi Liquid theory

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dc.creatorNg, Tai-Kai
dc.date1997-06-04
dc.date.accessioned2026-07-07T03:09:05Z
dc.date.available2026-07-07T03:09:05Z
dc.descriptionIn this paper we propose a new way of organizing many-body perturbation theory in the Path-integral formulation where a set of quasi-particle wave-functionals $ψ$'s are introduced and are identified with quasi-particles in Landau Fermi liquid theory. We show how Fermi liquid theory can be obtained through $ψ$'s in this new framework of perturbation theory, where the only assumption is adiabaticity between non-interacting and interacting states and the quasi-particle renormalization factor z does not appear explicitly. Consequences of our new formulation are discussed.
dc.description10 pages, Latex file
dc.identifierhttps://arxiv.org/abs/cond-mat/9706033
dc.identifierhttp://arxiv.org/abs/cond-mat/9706033
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/27747
dc.subjectCondensed Matter
dc.titleFunctional Integral approach to quasi-particles in Fermi Liquid theory
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