title: Spin echo in spinor dipolar Bose-Einstein condensates.
abstract: We theoretically propose and numerically realize spin echo in a spinor Bose-Einstein condensate (BEC). We investigate the influence on the spin echo of phase separation of the condensate. The equation of motion of the spin density exhibits two relaxation times. We use two methods to separate the relaxation times and hence demonstrate a technique to reveal magnetic dipole-dipole interactions in spinor BECs.
authors.affiliation: Department of Physics, Osaka City University, Osaka 558-8585, Japan.
authors.forename: Masashi
authors.initials: M
authors.lastname: Yasunaga
authors.forename: Makoto
authors.initials: M
authors.lastname: Tsubota