title: Discrete symmetries and 1/3-quantum vortices in condensates of F=2 cold atoms.
abstract: In this Letter we study discrete symmetries of mean field manifolds of condensates of F=2 cold atoms, and various unconventional quantum vortices. Discrete quaternion symmetries result in two species of spin defects that can only appear in integer vortices while cyclic symmetries are found to result in a phase shift of 2pi/3 (or 4pi/3) and therefore 1/3- (or 2/3-) quantum vortices in condensates. We also briefly discuss 1/3-quantum vortices in condensates of trimers.
authors.affiliation: Department of Physics and Astronomy, The University of British Columbia, Vancouver, B.C., Canada V6T 1Z1.
authors.forename: Gordon W
authors.initials: GW
authors.lastname: Semenoff
authors.forename: Fei
authors.initials: F
authors.lastname: Zhou