论文标题
在Yttrium Orthosilicate中位点2处的praseodymium离子的超精细相互作用和相干时间
Hyperfine interaction and coherence time of praseodymium ions at the site 2 in yttrium orthosilicate
论文作者
论文摘要
praseodymium（pr $^{3+} $）离子在Yttrium Orthosilicate的站点1中掺杂（Y $ _2 $ SIO $ _5 $），由于其出色的光学相干性和旋转相干性，已被广泛用作光子量子记忆。尽管与站点1相比，praseodymium离子占据了站点2 y $ _2 $ _2 $ _5 $ _5 $ crystal具有更好的光学连贯性，这可以在量子内存中更好地性能。在这里，我们通过实验表征地面状态$^3 $ h $ _4 $和激发状态的超细互动$^1 $ d $ _2 $ pr $^{3+} $在y $ $ _2 $ _2 $ _2 $ _2 $ _2 $ _2 $ _5 $使用Raman Heterodyne检测到的核磁共振。 Hamiltonians的超细互动均针对基于201磁场的Raman Heterodyne Spectra，重建了基础状态$^3 $ h $ _4 $和激发状态$^1 $ d $ _2 $。基态的两脉冲旋转回波相干寿命为2.6 $ \ pm $ \ pm $ 0.1毫秒的站点2，磁场为零，比站点1的磁场长五倍以上。Zeeman零一阶Zeeman在pr $^{3+$ $ _2 $ _2 $ _2 $ _2 $ _2 $ _2 $ _2 $^$ _2 $^$^$ _2的磁场转移了Zeeman的磁场。
Praseodymium (Pr$^{3+}$) ions doped in the site 1 of yttrium orthosilicate (Y$_2$SiO$_5$) has been widely employed as the photonic quantum memory due to their excellent optical coherence and spin coherence. While praseodymium ions occupying the site 2 in Y$_2$SiO$_5$ crystal have better optical coherence as compared with those at site 1, which may enable better performance in quantum memory. Here we experimentally characterize the hyperfine interactions of the ground state $^3$H$_4$ and excited state $^1$D$_2$ of Pr$^{3+}$ at site 2 in Y$_2$SiO$_5$ using Raman heterodyne detected nuclear magnetic resonance. The Hamiltonians for the hyperfine interaction are reconstructed for both ground state $^3$H$_4$ and excited state $^1$D$_2$ based on the Raman heterodyne spectra in 201 magnetic fields. The two-pulse spin-echo coherence lifetime for the ground state is measured to be 2.6$\pm$0.1 ms at site 2 with zero magnetic field, which is more than five times longer than that at site 1. The magnetic fields with zero first order Zeeman shift in the hyperfine transition for Pr$^{3+}$ at site 2 in Y$_2$SiO$_5$ are identified.
