Details

Autor(en) / Beteiligte

• Evslin, Jarah
• Zhang, Baiyang

Titel

Mass-gap in the compactified principal chiral model

Ist Teil von

• Physical review. D, 2018-10, Vol.98 (8), Article 085016

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• If the space of minima of the effective potential of a weakly coupled 2d quantum field theory is not connected, then a mass-gap will be nonperturbatively generated. As examples, we consider two ? models compactified on a small circle with twisted boundary conditions. In the compactified CP1 model, the vacuum manifold consists of two points and the mass-gap is nonperturbative. In the case of the compactified SU(2) principal chiral model, the vacuum manifold is a single circle and the mass-gap is perturbative.