一种抑制光移的广义Ramsey激发方案
A generalized Ramsey excitation scheme with suppressed light shift
摘要：
我们实验研究了最近提出的光激发方案[V.I. Yudin等人，Phys.Rev.A82，011804（R）（2010）]，其是分离振荡场的Ramsey方法的推广，并且由三个激励脉冲的序列组成。该脉冲序列被定制以产生共振信号，该共振信号不受与探测场的相互作用相关的跃迁频率的光偏移和其他偏移的影响。我们研究的方案，使用一个单一的捕获171 Yb+离子和激发高度禁止的2S 1/2- 2F 7/2电八极跃迁的条件下，光移远大于激发线宽，这是在赫兹范围内。实验表明，光移抑制了四个数量级，并对其波动具有免疫力。
英文摘要：
We experimentally investigate a recently proposed optical excitation scheme [V.I. Yudin et al., Phys. Rev. A 82, 011804(R)(2010)] that is a generalization of Ramsey's method of separated oscillatory fields and consists of a sequence of three excitation pulses. The pulse sequence is tailored to produce a resonance signal which is immune to the light shift and other shifts of the transition frequency that are correlated with the interaction with the probe field. We investigate the scheme using a single trapped 171Yb+ ion and excite the highly forbidden 2S1/2-2F7/2 electric-octupole transition under conditions where the light shift is much larger than the excitation linewidth, which is in the Hertz range. The experiments demonstrate a suppression of the light shift by four orders of magnitude and an immunity against its fluctuations.
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