Lattice formulation of the CPn-1 non-linear σ models

Research output: Contribution to journalArticle

Abstract

We set up a general lattice version of non-linear σ models defined on homogeneous spaces. We then apply this to the CPn-1 models which are the correct extension of the SU(2) σ model to SU(N). We exhibit their "confinement" property: the elementary multiplets Zα used to describe the system do not appear as physical particles but only as bound states ZαλαβaZβ. The method enable us to examine the "θ vacua" in the strong coupling limit by using a "dilute loop" approximation. We discuss the effect of the low activation energy for instantons which means that on a lattice, topological number is not conserved.

Original languageEnglish (US)
Pages (from-to)97-108
Number of pages12
JournalNuclear Physics, Section B
Volume152
Issue number1
DOIs
StatePublished - May 21 1979
Externally publishedYes

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formulations
instantons
fine structure
activation energy
approximation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Lattice formulation of the CPn-1 non-linear σ models. / Stone, Michael.

In: Nuclear Physics, Section B, Vol. 152, No. 1, 21.05.1979, p. 97-108.

Research output: Contribution to journalArticle

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