Rotor spectra, berry phases, and monopole fields: From antiferromagnets to QCD

S. Chandrasekharan; F. J. Jiang; M. Pepe; U. J. Wiese

doi:10.1103/PhysRevD.78.077901

Rotor spectra, berry phases, and monopole fields: From antiferromagnets to QCD

S. Chandrasekharan, F. J. Jiang, M. Pepe, U. J. Wiese

Department of Physics

Research output: Contribution to journal › Article

10 Citations (Scopus)

Abstract

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.

Original language	English
Article number	077901
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	78
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.78.077901
Publication status	Published - 2008 Oct 21

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ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

Cite this

Chandrasekharan, S., Jiang, F. J., Pepe, M., & Wiese, U. J. (2008). Rotor spectra, berry phases, and monopole fields: From antiferromagnets to QCD. Physical Review D - Particles, Fields, Gravitation and Cosmology, 78(7), [077901]. https://doi.org/10.1103/PhysRevD.78.077901

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Access to Document

10.1103/PhysRevD.78.077901