Sympathetic cooling of cold molecules

冷分子的交感冷却

• 批准号: 1925385
• 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: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1925385
• 关键词: Sympathetic; cooling; cold; molecules

The student is conducting experimental research in the EPSRC-recognised area of Cold Atoms and Molecules. Specifically, he is researching how to achieve sympathetic cooling of a gas of molecules into the ultracold regime through thermal contact with a much colder gas of laser cooled atoms. In order to do this, both molecular and atomic gases must be trapped in the same region of space. Unfortunately, the natural outcome of such contact between the two gases is for a chemical reaction to take place or for the molecule to change quantum state, in other words - chemistry happens. Chemistry is undesirable in this context as it leads to the molecules being lost. However, the intriguing research question is - can the chemistry be controlled?The student will be working on the further development of a machine called a moving-trap Zeeman decelerator that can be used to load a novel magnetic trap, which he is also developing, with atoms and molecules. The novelty of the trap is that its magnetic-field profile has been tailored so as to allow, not only magnetic confinement of both gases, but the laser cooling of the atoms. It has also been designed such that the quantum state of the atoms and molecules can be manipulated by optical pumping. PW will research how to use the magnetic fields and the optical pumping to switch off the chemistry in the trap so as to allow sympathetic cooling to occur unhindered.

该学生正在冷原子和分子的EPSRC识别区域进行实验研究。具体而言，他正在研究如何通过热接触与激光冷却原子的冷气体接触来实现分子气体的交感神经冷却。为此，必须将分子气体和原子气体都被困在同一空间区域中。不幸的是，两种气体之间这种接触的自然结果是要进行化学反应或分子改变量子态，换句话说 - 化学发生。在这种情况下，化学是不可取的，因为它导致分子丢失。但是，有趣的研究问题是 - 可以控制化学吗？学生将在进一步开发一台称为移动陷阱zeeman减速器的机器的开发，该机器可用于加载新型的磁性陷阱，他也在使用原子和分子来进行开发。陷阱的新颖性是，其磁场轮廓已经定制，以便不仅可以限制两种气体的磁性，还可以使原子的激光冷却。它也被设计为使原子和分子的量子状态可以通过光泵操纵。 PW将研究如何使用磁场和光学泵送以关闭陷阱中的化学反应，从而使交感神经冷却不受阻碍。

项目成果

Quadcubic interpolation: a four-dimensional spline method

四三次插值：四维样条方法

• DOI: 10.48550/arxiv.1904.09869
• 发表时间: 2019
• 期刊: arXiv e-prints
• 作者: Walker Paul A.

ARBTools: A Tricubic Spline Interpolator for Three-Dimensional Scalar or Vector Fields

ARBTools：用于三维标量或矢量场的三次样条插值器

• DOI: 10.5334/jors.258
• 发表时间: 2019
• 期刊: Journal of Open Research Software
• 作者: Walker P