Trapping of Neutral^87Rb Atoms on an Atomchip

Xiaolin, Li, Min Min +7 more

Xiaolin Li, Ke Min, Jiuyao Tang +3 more

We report an experiment of trapping of neutral 87 Rb atoms on a self-made atomchip. The H-shaped atomchip is made by magnetron sputtering technology, which is different from the atomchip technology of other teams. We collect 3×10 6 87 Rb atoms in the mirror magneto-optical trap (MOT) using the external MOT coils, and 1×10 5 87 Rb atoms are transferred to U-MOT using U-shaped wire in chip and a pair of bias coils.

Xiyuan Liu, Karl‐Heinz Brenner, S. Groth +3 more

Qudsia Sara Quraishi, Vladimir S. Malinovsky, Jason S. Alexander +3 more

A technique to drive stimulated Raman transition between spin and/or momentum states of ultracold 87Rb atoms confined on an atomchip trap is discussed. We present our experimental and theoretical approach to an all-optical manipulation of the atoms using an optical frequency comb emitted by a modelocked ultrafast pulsed laser.

Xiaolin Li, Ke Min, Bo Yan +3 more

Trapping potential of a Z-trap is calculated with analytic and numeric methods. It's found that when a trapping center is a little bit far from the chip surface (the distance is about one order of the half length of the Z-wire central part), the trapping depth is not approximately eqsual to the potential By created by a bias magnetic field, the potential energy at the trapping center should be subtracted from the potential By created by the bias field. On the other hand, if an atom cloud is compressed to a certain extent by increasing By, the trapping depth will be decreased rather than increased. The preparation of the Z-trap in an atom chip, the experimental setup, and the experimental procedure for trapping neutral 87Rb atoms is also introduced. At last we obtained 2×106 87Rb atoms trapped in the Z-trap.

Gene D. Sprouse, R. Fliller, Joshua M. Grossman +2 more