Publications [#245706] of Shailesh Chandrasekharan

Papers Published
  1. Chandrasekharan, S; Jiang, F-J; Pepe, M; Wiese, U-J, Rotor spectra, berry phases, and monopole fields: From antiferromagnets to QCD, Physical Review D, vol. 78 no. 7 (2008), pp. 077901 [pdf], [doi] .

    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.