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 effiicent hollow-beam induced Sisyphus cooling and repumping-beam induced geometric cooling, and they will be cooled to a few photon-recoil limits from MOT's temperature (approx60 um K), 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.
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机译：我们提出了一种全光冷却和俘获的Cs BEC方案，该方案由二极管激光器的锥体空心光束引力光阱（PHB GOT）和来自圆锥激光器的圆锥空心光束（CHB）GOT组成。 Ar〜+激光。在PHB GOT中，冷原子经历了有效的中空束诱导的Sisyphus冷却和再吸收束诱导的几何冷却，它们将被冷却到MOT温度（约60 um K）的几个光子反冲极限，而在Ar中〜+中空激光束陷阱，冷原子将通过拉曼冷却进一步冷却，并由蓝色失谐的覆盖束压缩。我们对PHB冷却过程进行了蒙特卡洛模拟，计算了Ar〜+空心激光束中〜133Cs原子的光势，并估算了总原子损耗和密度。我们的研究表明，在我们的全光偶极子阱中可以观察到〜133Cs原子的光陷阱Bose-Einstein凝聚（BEC）。
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