Quasi-particles in weak perturbations of non-interacting quantum lattice systems

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dc.creatorYarotsky, D. A.
dc.date2004-11-11
dc.date.accessioned2026-07-07T04:31:37Z
dc.date.available2026-07-07T04:31:37Z
dc.descriptionWe consider a general weak perturbation of a non-interacting quantum lattice system with a non-degenerate gapped ground state. We prove that the presence of isolated eigenvalues in the spectrum of the decoupled model leads to the existence of quasi-particles in the perturbed model. Also, a scattering theory for asymptotically free many-particle states is developed.
dc.description17 pages
dc.identifierhttps://arxiv.org/abs/math-ph/0411042
dc.identifierhttp://arxiv.org/abs/math-ph/0411042
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/57882
dc.subjectMathematical Physics
dc.titleQuasi-particles in weak perturbations of non-interacting quantum lattice systems
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