We trap and cool a gas composed of 40K and 87Rb, using a two-species magneto-optical trap (MOT). This trap represents the first step towards cooling the Bose-Fermi mixture to quantum degeneracy. Laser light for the MOT is derived from laser diodes and amplified with a single high-power semiconductor amplifier chip. The four-color laser system is described, and the single-species and two-species MOTs are characterized. Atom numbers of 1×107 40K and 2×109 87Rb are trapped in the two-species MOT. Observation of trap loss due to collisions between species is presented and future prospects for the experiment are discussed.
Physical Review A
- Pub Date:
- February 2002
- Optical cooling of atoms;
- Fermion systems and electron gas;
- Condensed Matter - Statistical Mechanics
- 4 pages, 4 figures