An optical dipole trap for transport of Rubidium-87 atoms

John Douglas Miller

Kurt W. Miller

夏生 一ノ関

A. Fioretti, Jérôme Lozeille, Carlo Andrea Massa +2 more

Megan Ivory, Austin R. Ziltz, Charles Fancher +7 more

We present a dual chamber atom chip apparatus for generating ultracold (87)Rb and (39)K atomic gases. The apparatus produces quasi-pure Bose-Einstein condensates of 10(4) (87)Rb atoms in an atom chip trap that features a dimple and good optical access. We have also demonstrated production of ultracold (39)K and subsequent loading into the chip trap. We describe the details of the dual chamber vacuum system, the cooling lasers, the magnetic trap, the multicoil magnetic transport system, the atom chip, and two optical dipole traps. Due in part to the use of light-induced atom desorption, the laser cooling chamber features a sufficiently good vacuum to also support optical dipole trap-based experiments. The apparatus is well suited for studies of atom-surface forces, quantum pumping and transport experiments, atom interferometry, novel chip-based traps, and studies of one-dimensional many-body systems.

Mingtao Cao, Liang Han, Yue-Rong Qi +3 more

We provide a theoretical study to calculate the spin-dependent optical lattice with rubidium Bose—Einstein condensation (BEC) in a steady magnetic field. The optical dipole potential variation at different Zeeman levels are obtained. We also show that atoms can be transported in three dimensions by changing the polarization of the trapping field. An explanation of this transportation process in an atomic coordinate is presented.