Rotor spectra, berry phases, and monopole fields: From antiferromagnets to QCD
Journal Article
The order parameter of a finite system with a spontaneously broken continuous global symmetry acts as a quantum mechanical rotor. Both antiferromagnets with a spontaneously broken SU(2)s spin symmetry and massless QCD with a broken SU(2)L×SU(2)R chiral symmetry have rotor spectra when considered in a finite volume. When an electron or hole is doped into an antiferromagnet or when a nucleon is propagating through the QCD vacuum, a Berry phase arises from a monopole field and the angular momentum of the rotor is quantized in half-integer units. © 2008 The American Physical Society.
Full Text
Duke Authors
Cited Authors
- Chandrasekharan, S; Jiang, FJ; Pepe, M; Wiese, UJ
Published Date
- October 21, 2008
Published In
Volume / Issue
- 78 / 7
Electronic International Standard Serial Number (EISSN)
- 1550-2368
International Standard Serial Number (ISSN)
- 1550-7998
Digital Object Identifier (DOI)
- 10.1103/PhysRevD.78.077901
Citation Source
- Scopus