Testing fundamental physics with ultracold molecules

用超冷分子测试基础物理

• 批准号: 2892764
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2892764
• 关键词: Testing; fundamental; physics; ultracold; molecules

Ultracold molecules can be used to measure the electron's electric dipole moment (eEDM) and to measure the stability of the electron-to-proton mass ratio. These measurements use the latest advances in quantum technology in order to search for new physics that goes beyond the Standard Model. The aim of the project is to measure the eEDM using molecules trapped in an optical lattice. The work will begin by laser cooling and magneto-optical trapping of the desired molecules. These will then be transferred to an optical lattice and transported into a magnetically shielded apparatus. Here, the molecular spin will be prepared by stimulated Raman adiabatic passage, then allowed to precess in the presence of a strong electric field. The electric-field-induced spin precession frequency determines the eEDM and can be measured by mapping the angle of the spin onto the hyperfine levels of the molecules and then reading out the populations in those levels.

超低分子可用于测量电子的电偶极矩（EEDM），并测量电子与普罗替子质量比的稳定性。这些测量结果使用量子技术的最新进展，以搜索超出标准模型的新物理学。该项目的目的是使用被困在光学晶格中的分子测量EEDM。这项工作将从所需分子的激光冷却和磁磁捕获开始。然后将这些转移到光学晶格中，并将其运输到磁屏蔽的设备中。在这里，分子自旋将通过刺激的拉曼绝热通道制备，然后在存在强电场的情况下允许进攻。电场诱导的自旋进动频率决定了EEDM，可以通过将旋转的角度映射到分子的超精细水平，然后在这些水平中读取种群来测量。