Strong-Coupling Expansions for Multiparticle Excitations: Continuum and Bound States

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dc.creatorTrebst, S.
dc.creatorMonien, H.
dc.creatorHamer, C. J.
dc.creatorWeihong, Z.
dc.creatorSingh, R. R. P.
dc.date2000-07-11
dc.date.accessioned2026-07-07T09:28:20Z
dc.date.available2026-07-07T09:28:20Z
dc.descriptionWe present a new linked cluster expansion for calculating properties of multiparticle excitation spectra to high orders. We use it to obtain the two-particle spectra for systems of coupled spin-half dimers. We find that even for weakly coupled dimers the spectrum is very rich, consisting of many bound states. The number of bound states depends on both geometry of coupling and frustration. Many of the bound states can only be seen by going to sufficiently high orders in the perturbation theory, showing the extended character of the pair-attraction.
dc.description4 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0007192
dc.identifierhttp://arxiv.org/abs/cond-mat/0007192
dc.identifierPhys. Rev. Lett. 85, 4373 (2000)
dc.identifierdoi:10.1103/PhysRevLett.85.4373
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/157419
dc.subjectStrongly Correlated Electrons
dc.titleStrong-Coupling Expansions for Multiparticle Excitations: Continuum and Bound States
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