Nuclear spin cooling using Overhauser-field selective coherent population trapping.
Nuclear spin cooling using Overhauser-field selective coherent population trapping.
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DOI：
10.1103/physrevlett.105.267202
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发表时间：
2010-08
影响因子：
8.6
通讯作者：
M. Issler;E. Kessler;G. Giedke;S. Yelin;I. Cirac;M. Lukin;A. Imamoğlu
中科院分区：
文献类型：
--
作者：
M. Issler;E. Kessler;G. Giedke;S. Yelin;I. Cirac;M. Lukin;A. Imamoğlu
我们证明，固态发射器的两个电子自旋态光吸收中的量子干涉效应可用于准备明确状态下的核自旋周围环境，从而抑制电子自旋相移。耦合的电子-核系统通过光激发诱导的核自旋扩散演变成相干布居捕获态，以实现广泛的初始光学失谐。单电子强烈改变其环境的这种演化的光谱特征是光学吸收实验中暗共振的急剧展宽。电子和核时间尺度的巨大差异使我们能够验证所需状态下核自旋的准备情况。
We show that a quantum interference effect in optical absorption from two electronic spin states of a solid-state emitter can be used to prepare the surrounding environment of nuclear spins in well-defined states, thereby suppressing electronic spin dephasing. The coupled electron-nuclei system evolves into a coherent population trapping state by optical-excitation-induced nuclear-spin diffusion for a broad range of initial optical detunings. The spectroscopic signature of this evolution where the single-electron strongly modifies its environment is a drastic broadening of the dark resonance in optical absorption experiments. The large difference in electronic and nuclear time scales allows us to verify the preparation of nuclear spins in the desired state.