Type-I integrable quantum impurities in the Heisenberg model

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Type-I quantum impurities are investigated in the context of the integrable Heisenberg model. This type of defects is associated to the (q)-harmonic oscillator algebra. The transmission matrices associated to this particular type of defects are computed via the Bethe ansatz methodology for the XXX model, as well as for the critical and non-critical XXZ spin chain. In the attractive regime of the critical XXZ spin chain the transmission amplitudes for the breathers are also identified.
Original languageEnglish
Pages (from-to)885–899
Number of pages15
JournalNuclear Physics B
Issue number3
Publication statusPublished - 21 Dec 2013


  • math-ph
  • hep-th
  • math.MP
  • nlin.SI


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