Dependence of $it{in-situ}$ Bose condensate size on final frequency of RF-field in evaporative cooling

Pramana

H S RAWAT1¹  S P RAM¹  S R MISHRA1 2¹  S K TIWARI¹ 

[1] Raja Ramanna Centre for Advanced Technology, Indore 452 013, India$$

关键词: Laser atom cooling;    magnetic trapping;    evaporative cooling;    Bose–Einstein condensation;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

We report the results of $it{in-situ}$ characterization of $^{87}$Rb atom cloud in a quadrupole Ioffe configuration (QUIC) magnetic trap after a radio-frequency (RF) evaporative cooling of the trapped atom cloud. The $it{in-situ}$ absorption images of the atom cloud have shown clear bimodal optical density (OD) profiles which indicate the Bose–Einstein condensation (BEC) phase transition in the trapped gas. Also, we report here, for the first time, the measured variation in the sizes of the condensate and thermal clouds with the final frequency selected in the frequency scan of the RF-field for evaporative cooling. These results on frequency-dependent sizes of the clouds are consistent with the theoretical understanding of the BEC phenomenon in the trap.

【 授权许可】

Unknown