Sympathetic cooling in a mixture of diamagnetic and paramagnetic atoms
S Tassy, Nils Nemitz, F Baumer +3 more
We have experimentally realized a hybrid trap for ultracold paramagnetic rubidium and diamagnetic ytterbium atoms by combining a bichromatic optical dipole trap for ytterbium with a Ioffe-Pritchard-type magnetic trap for rubidium. In this hybrid trap, sympathetic cooling of five different ytterbium isotopes through elastic collisions with rubidium was achieved. A strong dependence of the interspecies collisional cross section on the mass of the ytterbium isotope was observed.
arXiv:0709.0827•Journal of Physics B Atomic Molecular and Optical Physics•Oct 5, 2010•41 citations