报告题目：Precision measurements of molecular ions in a ring trap - a new approach for testing fundamental symmetries

报告嘉宾：周岩，内华达大学拉斯维加斯分校 助理教授

报告时间：2024年8月9日下午14：30

报告地点：唐敖庆楼B521报告厅

嘉宾简介

　　周岩，现任内华达大学拉斯维加斯分校助理教授，2007年本科毕业于北京大学，2014年博士毕业于麻省理工学院，师从分子光谱专家R. W. Field。随后于实验天体物理联合研究所 (JILA) 在诺贝尔奖得主E. A. Cornell的指导下从事博士后研究，专注于精密测量领域。

近年来，周岩主要研究方向为分子离子的精密测量和量子信息，首次提出利用一种通用型量子探测器来测量时间反演对称性破缺，从而探索超越粒子标准模型的新物理现象。主要技术手段包括通过量子纠缠态实现分子单一量子态的操控、设计一种新的环形离子阱，以及在旋转坐标系中的量子态操控和精密测量。这种新方法可以广泛应用于极性双原子分子离子以及包含振动耦合的多原子分子离子，目标包括探测电子的电偶极矩和原子核的磁四极矩。

报告摘要

　　In this presentation, I will discuss a new experimental platform designed to facilitate quantum logic control of polar molecular ions in a segmented ring ion trap, paving the way for precision measurements. This approach focuses on achieving near-unity state preparation and detection, as well as long spin-precession coherence. A distinctive aspect lies in separating state preparation and detection conducted in a static frame, from parity-selective spin-precession in a rotating frame. Moreover, this method is designed to support both temporally and spatially localized multiplexing measurements, enhancing the ability to probe and minimize potential systematic errors. While the primary focus of this talk is on detecting the electron’s Electric Dipole Moment (eEDM) using ²³²ThF+ ions, the proposed methodology holds promise for broader applications, particularly with ion species like ²²⁹ThF+ and ¹⁸¹TaO+ that exhibit enhanced sensitivity to the nuclear Magnetic Quadruple Moment (nMQM).

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物质模拟方法与软件教育部重点实验室