Nonlocal Nuclear Spin Quieting in Quantum Dot Molecules: Optically Induced Extended Two-Electron Spin Coherence Time.
Nonlocal Nuclear Spin Quieting in Quantum Dot Molecules: Optically Induced Extended Two-Electron Spin Coherence Time.
复制标题
量子点分子中的非局域核自旋安静：光诱导延长的两电子自旋相干时间。
DOI：
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发表时间：
2015
影响因子：
8.6
通讯作者：
D. Steel
中科院分区：
文献类型：
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作者：
C. Chow;Aaron M. Ross;Danny Kim;D. Gammon;A. Bracker;L. Sham;D. Steel
我们证明了所有四个双电子自旋基态的InAs量子点分子（QDM）通过非局域抑制核自旋波动在两个垂直堆叠的量子点（QD）之间的相干性的扩展，而光学寻址只有顶部的量子点跃迁。通过暗态光谱揭示了量子点之间的交换相互作用介导的核自旋锁定导致的长相干时间。线形分析提供了第一次测量的奥弗豪泽场分布的平静与减少核自旋波动。
We demonstrate the extension of coherence between all four two-electron spin ground states of an InAs quantum dot molecule (QDM) via nonlocal suppression of nuclear spin fluctuations in two vertically stacked quantum dots (QDs), while optically addressing only the top QD transitions. Long coherence times are revealed through dark-state spectroscopy as resulting from nuclear spin locking mediated by the exchange interaction between the QDs. Line shape analysis provides the first measurement of the quieting of the Overhauser field distribution correlating with reduced nuclear spin fluctuations.
影响因子：
3.7
作者：
A. Brash;L. Martins;Feng Liu;J. H. Quilter;A. Ramsay;M. S. Skolnick;A. M. Fox
通讯作者：
A. Brash;L. Martins;Feng Liu;J. H. Quilter;A. Ramsay;M. S. Skolnick;A. M. Fox
影响因子：
38.3
作者：
Chekhovich, E. A.;Kavokin, K. V.;Tartakovskii, A. I.
通讯作者：
Tartakovskii, A. I.