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

We 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 scatterin...

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Bibliographische Detailangaben

1. Verfasser:	Yarotsky, D. A
Format:	Artikel
Sprache:	eng
Schlagworte:	Mathematics - Mathematical Physics Physics - Mathematical Physics
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