Spectrum of boundary states in the open Hubbard chain

verfasst von

Gerald Bedürftig, Holger Frahm

Abstract

We use the Bethe ansatz solution for the one-dimensional Hubbard model with open boundary conditions and applied boundary fields to study the spectrum of bound states at the boundary. Depending on the strength of the boundary potentials, one finds that the true ground state contains a single charge or, for boundary potentials comparable with the Hubbard interaction, a pair of electrons in a bound state. If these are left unoccupied one finds holon and spinon bound states. We compute the finite size corrections to the low-lying energies in this system and use the predictions of boundary conformal field theory to study the exponents related to the orthogonality catastrophe.

Organisationseinheit(en)

Institut für Theoretische Physik

Typ

Artikel

Journal

Journal of Physics A: Mathematical and General

Band

30

Seiten

4139-4149

Anzahl der Seiten

11

ISSN

0305-4470

Publikationsdatum

21.06.1997

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Statistische und nichtlineare Physik, Mathematische Physik, Allgemeine Physik und Astronomie

Elektronische Version(en)

https://doi.org/10.1088/0305-4470/30/12/006 (Zugang: Unbekannt)