Measurement of Magic Wavelengths for the 40Ca+ Clock Transition

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1 Measurement of Magic Wavelengths for the 40Ca+ Clock Transition
原子分子光物理重要成果系列学术报告（6） Measurement of Magic Wavelengths for the 40Ca+ Clock Transition 报告人：管桦（研究员） 时 间：10月27日（星期五）上午10：00 地 点：波谱楼10楼1017会议室 个人履历: 华中科技大学 本科 中科院武汉物数所 硕博连读 中科院武汉物数所 助理研究员 中科院武汉物数所 副研究员 2015-至今 中科院武汉物数所 研究员 报告摘要： In a special laser field, the two energy levels of a special optical transition of an atom have same dipole polarizability, thus, the frequency shift is zero, and so, the wavelengths of the laser are called magic wavelengths. it will have broad application in the research of quantum state manipulation and precision spectroscopy. Based on the established single trapped and cold 40Ca+ optical clocks, the researchers of the ion trap group measured precisely the optical shift of 40Ca+ optical transition in special laser wavelengths, and the experimental values of magic wavelengths are achieved, with the precision of 2 ppm, and the experimental and theoretic values are coincidental. Based on the experimental values of magic wavelengths, the oscillator strength ratio of 4S1/2-4P1/2 and 4S1/2-4P3/2 is achieved, which provides the experimental evidence for studying atomic fine structure. The results provide new idea for improving the accuracy of precision spectroscopy, and are also the basis for all-optical trapped ion clocks in future. Reference： Liu Pei-Liang, Huang Yao, Bian Wu, Shao Hu, Guan Hua*, Tang Yong-Bo, Li Cheng-Bin, Mitroy J., Gao Ke-Lin*, Measurement of Magic Wavelengths for the 40Ca+ Clock Transition, Physical Review Letters, 114, (2015).