title: Dynamical creation of fractionalized vortices and vortex lattices.
abstract: We investigate the dynamic creation of fractionalized half-quantum vortices in Bose-Einstein condensates of sodium atoms. Our simulations show that both individual half-quantum vortices and vortex lattices can be created in rotating optical traps when additional pulsed magnetic trapping potentials are applied. We also find that a distinct periodically modulated spin-density-wave spatial structure is always embedded in square half-quantum vortex lattices. This structure can be conveniently probed by taking absorption images of ballistically expanding cold atoms in a Stern-Gerlach field.
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China.
authors.forename: An-Chun
authors.initials: AC
authors.lastname: Ji
authors.forename: W M
authors.initials: WM
authors.lastname: Liu
authors.forename: Jun Liang
authors.initials: JL
authors.lastname: Song
authors.forename: Fei
authors.initials: F
authors.lastname: Zhou