首页|Zeeman decoherence effect of trapped 199Hg+ion Ramsey spectra
Zeeman decoherence effect of trapped 199Hg+ion Ramsey spectra
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Zeeman decoherence effect of trapped 199Hg+ion Ramsey spectra
In the 199Hg+ion microwave clock,the Zeeman decoherence effect caused by the overlapping of Zeeman sidebands and the radial secular motion sidebands will decrease the contrast of the Ramsey fringe,thus reducing the signal-to-noise ratio of the spectra.In this paper,the Zeeman decoherence effect is analyzed theoretically and investigated experimentally.A simplified model is built to describe the Ramsey spectral probability,in which the transverse relaxation time T2 is introduced to characterize the influence of the Zeeman decoherence effect phenomenologically.The experiments were carried out on a linear quadrupole trap 199Hg+ion clock.The results show that the probability model matches well with the experimental data,and the magnetic field value should be more than 150 mGs(1 Gs=10-4 T)to avoid the Zeeman decoherence effect.
199Hg+ion microwave clockZeeman decoherencetransverse relaxation time
刘格、柳浩、陈义和、王健、黄书泓、李承斌、佘磊
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Key Laboratory of Atomic Frequency Standards(KLAFS),Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China
University of Chinese Academy of Sciences,Beijing 100049,China
State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China
199Hg+ion microwave clock Zeeman decoherence transverse relaxation time
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