Spinon gas description of the S=1/2 Heisenberg chain with inverse-square exchange: Exact spectrum and thermodynamics

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Abstract

The exact spectrum and thermodynamics of the S=1/2 Heisenberg chain with inverse-square exchange are explicitly obtained in closed form, and a description in terms of semionic spin-1/2 spinon excitations is developed. The unexpected degeneracies of the spectrum lead to a new representation of the k=1 SU(2) Wess-Zumino-Witten conformal field theory that exposes an infinite set of SU(2) symmetries of that model.

Original languageEnglish (US)
Pages (from-to)1529-1532
Number of pages4
JournalPhysical Review Letters
Volume66
Issue number11
DOIs
StatePublished - Jan 1 1991

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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