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Scalar Kinks

We determine the excitations and $S$ matrix of an integrable isotropic antiferromagnetic quantum spin chain of alternating spin 1/2 and spin 1. There are two types of gapless one-particle excitations: the usual spin 1/2 (``spinor'') kink, and a new spin 0 (``scalar'') kink. Remarkably, the scalar-spinor scattering is nontrivial, yet the spinor-spinor scattering is the same as if the scalar kinks were absent. Moreover, there is no scalar-scalar scattering.

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Co-authorshipCo-authorshipCo-authorshipAuthorshipAuthorshipAuthorshipTopic signalTopic signalWScalar Kinkspreprint / 1994AH. J. de VegaResearcherALuca MezincescuResearcherARafael I. NepomechieResearcherThep-th13268 worksTcond-mat101 works
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Scalar Kinks

preprint / 1994

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