Generalized Random-Phase Approximation Theory of Quasiparticle Spectral Functions: Application to Bilayer Quantum Hall Ferromagnets

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dc.creatorJoglekar, Yogesh N.
dc.creatorMacDonald, Allan H.
dc.date2001-08-04
dc.date.accessioned2026-07-07T02:42:20Z
dc.date.available2026-07-07T02:42:20Z
dc.descriptionWe present a microscopic theory of ground-state spectral function of bilayer quantum Hall systems that includes interactions between Hartree-Fock quasiparticles and quantum fluctuations of the order parameter field. The collective modes in these systems are properly described only when fluctuations in direct and exchange particle-hole channels are taken into account. Using an auxiliary field functional integral approach, we present a generalization of the random phase approximation \emph{for quasiparticle self-energy} which captures fluctuations in both channels. We discuss its relationship to diagrammatic perturbation theory and an adiabatic approximation. We present simple analytical results for the quasiparticle self-energy and the renormalized order parameter that follow from this theory.
dc.description15 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0108077
dc.identifierhttp://arxiv.org/abs/cond-mat/0108077
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/18103
dc.subjectMesoscale and Nanoscale Physics
dc.titleGeneralized Random-Phase Approximation Theory of Quasiparticle Spectral Functions: Application to Bilayer Quantum Hall Ferromagnets
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