Mass generation by merons in quantum spin chains and the O(3)σmodel
- 3 February 1986
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 56 (5), 408-411
- https://doi.org/10.1103/physrevlett.56.408
Abstract
We argue that the mass gap in the O(3) σ model is produced by condensation of vortices of topological charge (1/2) (merons). This mechanism is not effective at topological angle theta=π, supporting arguments that this model is massless. These two models are the large-spin limit of integer (half-integer) quantum spin chains.Keywords
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