A Proposal for Realizing BEC of 133Cs Atoms in Blue-Detuned Ar+ Hollow-Beam Trap
- 521 Downloads
We propose an all-optically-cooled and -trapped Cs BEC scheme, which is composed of a pyramidal-hollow-beam gravito-optical trap (PHB GOT) from a diode laser and a conical-hollow-beam (CHB) GOT from an Ar+ laser. In the PHB GOT, the cold atoms experience an efficient hollow-beam induced Sisyphus cooling and repumpimg-beam induced geometric cooling, and they will be cooled to a few photon-recoil limits from MOT’s temperature (~60 μK). Whereas in the Ar+ hollow-laser-beam trap, cold atoms will be further cooled by Raman cooling and compressed by a blue-detuned cover beam. We have performed Monte-Carlo simulations for PHB cooling process, calculated the optical potential for 133Cs atoms in Ar+ hollow laser beam, and estimated total atomic loss and density. Our study shows that an optically-trapped Bose-Einstein condensation (BEC) of 133Cs atoms may be observed in our all-optical dipole trap.
KeywordsCold Atom Magnetic Trap Trapping Potential Dipole Trap Atomic Sample
Unable to display preview. Download preview PDF.