A quantum degenerate Bose-Fermi mixture of $^{41}$K and $^6$Li
| Autor: | Hao-Ze Chen, Xiao-Qiong Wang, Xiang-Pei Liu, Yu-Ao Chen, Jian-Wei Pan, Xing-Can Yao, Yu-Ping Wu |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Condensed Matter::Quantum Gases Atomic Physics (physics.atom-ph) Degenerate energy levels FOS: Physical sciences Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 010305 fluids & plasmas Physics - Atomic Physics Quantum Gases (cond-mat.quant-gas) Quantum mechanics 0103 physical sciences Physics::Atomic and Molecular Clusters Physics::Atomic Physics 010306 general physics Condensed Matter - Quantum Gases Quantum Fermi Gamma-ray Space Telescope |
| Popis: | We report a new apparatus for the study of two-species quantum degenerate mixture of $^{41}$K and $^6$Li atoms. We develop and combine several advanced cooling techniques to achieve both large atom number and high phase space density of the two-species atom clouds. Furthermore, we build a high-efficiency two-species magnetic transport system to transfer atom clouds from the 3D magneto-optical-trap chamber to a full glass science chamber of extreme high vacuum environment and good optical access. We perform a forced radio-frequency evaporative cooling for $^{41}$K atoms while the $^6$Li atoms are sympathetically cooled in an optically-plugged magnetic trap. Finally, we achieve the simultaneous quantum degeneracy for the $^{41}$K and $^6$Li atoms. The Bose-Einstein condensate of $^{41}$K has 1.4$\times$10$^5$ atoms with a condensate fraction of about 62%, while the degenerate Fermi gas of $^6$Li has a total atom number of 5.4$\times$10$^5$ at 0.25 Fermi temperature. |
| Databáze: | OpenAIRE |
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