Mr. Xianghua Huang Profile

Xianghua Huang

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Proceedings Article | 18 March 2024 Paper

Review of cold atom quantum-based vacuum metrology

Zhengwei Fu, Xianghua Huang, Junxiao Li, Shuiwang Yang, Jianghui Zheng

Proceedings Volume 13104, 1310409 (2024) https://doi.org/10.1117/12.3016054

KEYWORDS: Chemical species, Quantum measurement, Vacuum, Standards development, Rubidium, Quantum technologies, Quantum numbers, Magnetism, Quantum limits, Laser development

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Quantum metrology technology is an advanced measurement method, which can achieve the accuracy that classical metrology is difficult to measure, and supplement the accuracy and stability defects caused by the standard quantum limit. In addition, reproducing quantum effects and quantum phenomena into units of metrology, which is obviously superior to the traditional measurement technology in terms of measurement accuracy, sensitivity and stability that could realize the quantum value transfer and traceability activities. With the development of laser cooling and trapping atom technology, the pressure measurement range of cold atom quantum-based vacuum metrology(CAVM) may reach 10^-4~10^-10 Pa or even lower . Benefiting from the loss rate of cold atoms in CAVM is only controlled by the collision cross section between cold atoms and gases, CAVM has the potential to develop into a emerging generation of vacuum metrology technology²⁷. In this paper, the basic concept, structure and working principle of magneto-optical traps(MOT) for laser cooling atoms and trapping atoms are briefly described; Then, the basic principle of the CAVM is introduced. Furthermore, through collecting and sorting out a large number of literature about this technology, the advantages and key technologies of this technique in recent years are comprehensively analyzed and summarized; Finally, the developing trend of the CAVM is prospected.

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