title: Control of laser-induced frequency shift in ultracold cesium molecules by an external magnetic field.
abstract: We investigate an effective control of the laser-induced frequency shift of ultracold cesium molecules formed by photoassociation (PA) in a magnetically levitated crossed dipole trap via an external magnetic field. A series of molecular PA spectra have been measured with increasing the PA laser intensity at different bias fields. We find that the slope of laser-induced frequency shift is strongly dependent on the external magnetic field: the slope can be increased up to a maximum of ∼6 times compared with a slope without an external magnetic field. A qualitatively theoretical explanation has been offered by considering the external magnetic field that can be used to manipulate the interaction between ultracold atoms.
authors.forename: Yuqing
authors.initials: Y
authors.lastname: Li
authors.forename: Guosheng
authors.initials: G
authors.lastname: Feng
authors.forename: Wenliang
authors.initials: W
authors.lastname: Liu
authors.forename: Jizhou
authors.initials: J
authors.lastname: Wu
authors.forename: Jie
authors.initials: J
authors.lastname: Ma
authors.forename: Liantuan
authors.initials: L
authors.lastname: Xiao
authors.forename: Suotang
authors.initials: S
authors.lastname: Jia