Improved variational estimates for the mass gap in the two-dimensional XY-model

A. Patkós, N. D.Hari Dass

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25 Citations (Scopus)


The variational estimate obtained recently by us for the mass gap of the two-dimensional XY-model is improved by extending the treatment to higher powers of the transfer operator. The relativistic dispersion relation for single particle states of low momentum is also verified.

Original languageEnglish
Pages (from-to)391-394
Number of pages4
JournalPhysics Letters B
Issue number4-6
Publication statusPublished - Jan 1 1982


ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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