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Murray Barrett Group

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Murray Barrett Group

The development of stable and accurate time standards has historically been an important driver of both fundamental science and applied technologies. Recent years have seen phenomenal progress in atomic clocks based on optical transitions such that several systems now exceed state-of-the-art cesium fountain clocks. Our group is investigating singly-ionised lutetium as a potential clock candidate. This ion has a very unique atomic structure supporting a total of three clock transitions with extremely low sensitivities to external electromagnetic fields. A fortuitous property of one transition allows micromotion-induced shifts from the trapping fields to be exactly cancelled making it a prime candidate for a multi-ion clock. Moving from the usual single-ion clock to the many ion arena will eliminate the stability bottleneck facing all other ion-based clocks today and open the possibility of applying quantum logic techniques to enhance clock stability.

Group Members

Murray Barrett

Principal Investigator

Kyle Arnold

Kyle Arnold

Senior Research Scientist (A)

Nakarin Jayjong

CQT PhD Student

Zhao Qi

CQT PhD Student

Qin Qichen

CQT PhD Student

Zhang Zhao

CQT PhD Student

Michael Lee Dao Kang

CQT PhD Student

Recent papers

Highlights

Media, Science

27 January 2025

Singapore joins worldwide scientific network to search for exotic physics

Science

1 August 2023

Lutetium clock a contender to redefine the second

Report

5 August 2022

Presenting CQT’s annual report for 2021

Award

21 April 2022

CQT researchers awarded grants under Singapore’s Quantum Engineering Programme

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Publications by CQT researchers during 2024 by journal impact factor (IF)​

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Count of CQT staff and students as of 31 Dec 2024​

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