On the Spectra of the Kink for Ferromagnetic XXZ Models

Taku Matsui

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13 Citations (Scopus)


We consider the kink (infinite volume nontranslationally invariant ground states) of the ferromagnetic XXZ models on the multi-dimensional lattices. We obtained the following results: (i) The pure states satisfying the local zero energy condition are necessarily product states, (ii) The Hamiltonian in the GNS representation of the kink has no gap between the ground-state eigenvalue and the rest of the spectra.

Original languageEnglish
Pages (from-to)229-239
Number of pages11
JournalLetters in Mathematical Physics
Issue number3
Publication statusPublished - Nov 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Mathematical Physics


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