论文标题
y $ _2 $ SIO $ _5 $
Superhyperfine induced photon-echo collapse of erbium in Y$_2$SiO$_5$
论文作者
论文摘要
我们使用Photon-Echo技术调查了y $ _2 $ _2 $ _5 $ _5 $的ER $^{3+} $的破裂性。我们通过考虑由大量相邻的旋转引起的所谓的超级芬丁调制，以独特的相干时间准确地重现各种衰减曲线。无需调用自旋波动的任何特征时间来再现非常不同的衰减曲线。当磁性降低时所涉及的核的数量增加。将实验与将100个周围离子与其在晶体框架中的确切位置相关联的模型进行了比较。我们还得出了一个近似球形模型（角平均），以解释主要特征接近零场的衰减曲线。
We investigate the decoherence of Er$^{3+}$ in Y$_2$SiO$_5$ at low magnetic fields using the photon-echo technique. We reproduce accurately a variety of the decay curves with a unique coherence time by considering the so-called superhyperfine modulation induced by a large number of neighbouring spins. There is no need to invoke any characteristic time of the spin fluctuations to reproduce very different decay curves. The number of involved nuclei increases when the magnetic is lowered. The experiment is compared with a model associating 100 surrounding ions with their exact positions in the crystal frame. We also derive an approximate spherical model (angular averaging) to interpret the main feature the observed decay curves close to zero-field.
