Ultracold mixtures of Cs and Yb atoms

Cs 和 Yb 原子的超冷混合物

• 批准号: 2747975
• 金额: --
• 依托单位: Durham University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2747975
• 关键词: Ultracold; mixtures; Cs; Yb; atoms

This project concerns the study of ultracold and quantum degenerate mixtures of Cs and Yb atoms confined in optical traps and lattices. Cs and Yb have contrasting atomic structure that opens up new opportunities in the context of ultracold physics experiments. Cs has a single valence electron making it sensitive to magnetic potentials. Amongst other things this leads to broad Feshbach resonances that allow the control of intraspecies interactions. In contrast Yb has two valence electrons in a closed shell, making Yb insensitive to magnetic potentials and leading to narrow intercombination lines suitable for laser cooling to ultracold temperatures. Moreover, Yb has several stable isotopes suitable for study, extending the range of experimental possibilities and allowing for the preparation of Bose-Bose and Bose-Fermi mixtures with Cs. Finally the different transition wavelengths in Cs and Yb allow for species-specific trapping and manipulation with optical fields. All of these properties will be exploited in the study of new physics with Cs and Yb. Specifically the project targets high-resolution imaging of the gas in the droplet phase where beyond mean-field effects stabilise the system.

本计画系关于超冷及量子简并的铯、镱原子混合物在光阱及晶格中的研究。Cs和Yb具有截然不同的原子结构，这在超冷物理实验中开辟了新的机会。Cs具有单价电子，使其对磁势敏感。除此之外，这导致了广泛的Feshbach共振，允许控制种内相互作用。相比之下，Yb在封闭壳层中有两个价电子，使得Yb对磁势不敏感，并导致适合激光冷却到超冷温度的窄互组合线。此外，Yb有几种稳定的同位素适合研究，扩大了实验的可能性范围，并允许制备玻色-玻色和玻色-费米与铯的混合物。最后，Cs和Yb的不同跃迁波长允许利用光场进行物种特异性捕获和操纵。所有这些性质都将在Cs和Yb的新物理研究中得到利用。具体来说，该项目的目标是液滴阶段的气体的高分辨率成像，其中超出平均场效应稳定系统。