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