Suppression of spin-exchange relaxation using pulsed parametric resonance.
Suppression of spin-exchange relaxation using pulsed parametric resonance.
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DOI：
10.1103/physrevlett.111.043002
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发表时间：
2013-07-26
影响因子：
8.6
通讯作者：
Walker TG
中科院分区：
文献类型：
--
作者：
Korver A;Wyllie R;Lancor B;Walker TG
我们证明了碱金属原子自旋在交流耦合的2π脉冲序列中被有效地消除了近地尺度场中拉莫进动的自旋交换退相，这些脉冲以拉莫进动频率重复。自旋交换碰撞对光谱线宽的贡献被脉冲占空比的系数减小。我们在高达0.1G的磁场中实验演示了共振横向泵浦，给出了被抑制的自旋交换弛豫的实验测量，并显示了相对于光窄标量磁强计的增强的磁强计响应。
We demonstrate that spin-exchange dephasing of Larmor precession at near-Earth-scale fields is effectively eliminated by dressing the alkali-metal atom spins in a sequence of ac-coupled 2π pulses, repeated at the Larmor precession frequency. The contribution of spin-exchange collisions to the spectroscopic linewidth is reduced by a factor of the duty cycle of the pulses. We experimentally demonstrate resonant transverse pumping in magnetic fields as high as 0.1 G, present experimental measurements of the suppressed spin-exchange relaxation, and show enhanced magnetometer response relative to a light-narrowed scalar magnetometer.