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journal article·2023-05-01Open access

Vacuum pressure measurement of cold 7Li atoms in the magneto-optical and magnetic trap

Xuejiao Zhang, Rui Li, Jingyi Zhang, Zhehan Li, Haibin Wu

AIP Advances· Volume 13· Issue 5
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Source abstract

Abstract

Cold atoms play a very important role in metrology. The ultra-high or extreme-high vacuum pressure can be accurately measured by investigating the collision of cold atoms and residual atoms in the environment. We report a vacuum pressure metrometer using cold 7Li atoms as sensor atoms in a magneto-optical trap and a magnetic trap. The accuracy, uncertainty, and feasibility of the measurements in such two different traps are studied and compared in the pressure range from 10−5 to 10−8 Pa. It is found that the vacuum pressure measurement in a magneto-optical trap is more advantageous with a higher accuracy, higher signal-to-noise ratio, and shorter measurement time under current conditions. The results may be used to realize an applicable cold atom quantum vacuum standard.
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Research context

OpenAlex topics: Cold Atom Physics and Bose-Einstein Condensates · Advanced Frequency and Time Standards · Atomic and Subatomic Physics Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Precision Spectroscopy, Institute of Quantum Science and Precision Measurement, East China Normal University 1 , Shanghai 200062, People’s Republic of China

Collaborative Innovation Center of Extreme Optics, Shanxi University 2 , Taiyuan 030006, People’s Republic of China

Shanghai Research Center for Quantum Sciences 3 , Shanghai 201315, People’s Republic of China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Shanghai Municipal Science and Technology Major Project

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