Author:
Dong Cheng,Fang Xiangqian,Sang Junjun,Tang Jun,Dong Haifeng,Sugawara Yasuhiro,Li Yanjun,Ma Zongmin,Liu Jun
Abstract
Abstract
Anti-relaxation surface coatings can reduce collisions between alkali-metal atoms and cell walls, thereby prolonging the spin-polarization lifetime of alkali-metal atoms. This phenomenon can considerably improve the performance of quantum sensors. Researchers have focused on the surface topography and composition of anti-relaxation coatings in alkali-metal vapor cells and on methods that provide an increase in the relaxation time of alkali metals. We proposed a novel method to characterise the coating performance of alkali-metal cells by directly measuring the energy dissipation during collisions between the anti-relaxation coating surface and atoms in the cell. We found that the interactions between alkali-metal atoms and the anti-relaxation coating resemble elastic collisions, which can be indirectly characterised by the energy dissipation during interactions between an atomic force microscopy tip and atoms. In addition, we confirmed that the energy dissipation between collisions is positively correlated with the relaxation characteristics of alkali metals at various temperatures. This discovery is of great significance as it can be utilised to characterise the anti-relaxation coating performance of alkali-metal cells by directly analysing the energy dissipation of anti-relaxation coatings instead of measuring the relaxation time.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Natural Science Foundation of Shanxi Province
Fund for Shanxi Key Subjects Construction
Key Research and Development Program in Shanxi Province
Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi
Subject
General Physics and Astronomy,Physics and Astronomy (miscellaneous),General Engineering
Cited by
1 articles.
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