Coupling a Surface Acoustic Wave to an Electron Spin in Diamond via a Dark State
Coupling a Surface Acoustic Wave to an Electron Spin in Diamond via a Dark State
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DOI：
10.1103/physrevx.6.041060
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发表时间：
2016-12-20
影响因子：
12.5
通讯作者：
Wang, Hailin
中科院分区：
文献类型：
--
作者：
Golter, D. Andrew;Oo, Thein;Wang, Hailin
量子声学的新兴领域探索声波与人造原子之间的相互作用及其在量子信息处理中的应用。在这项实验研究中，我们利用氮空位中心激发态的强应变耦合，同时避免这些态的寿命较短，从而证明了金刚石中表面声波（SAW）与电子自旋之间的耦合。 SAW自旋耦合通过三能级系统进行，其中两个基自旋态通过声子辅助以及直接偶极子光学跃迁耦合到公共激发态。相干布居捕获和光驱动自旋跃迁均已实现。相干布居捕获证明了声表面波和电子自旋相干性在暗态下的耦合。光学驱动的自旋跃迁类似于俘获离子系统中的边带跃迁，可以实现自旋和机械自由度的量子控制，并有可能成为用于量子计算应用的类俘获离子固态系统。这些结果为基于自旋的量子声学建立了一个实验平台，弥合了自旋电子学和量子声学之间的差距。
The emerging field of quantum acoustics explores interactions between acoustic waves and artificial atoms and their applications in quantum information processing. In this experimental study, we demonstrate the coupling between a surface acoustic wave (SAW) and an electron spin in diamond by taking advantage of the strong strain coupling of the excited states of a nitrogen vacancy center while avoiding the short lifetime of these states. The SAW-spin coupling takes place through a.-type three-level system where two ground spin states couple to a common excited state through a phonon-assisted as well as a direct dipole optical transition. Both coherent population trapping and optically driven spin transitions have been realized. The coherent population trapping demonstrates the coupling between a SAW and an electron spin coherence through a dark state. The optically driven spin transitions, which resemble the sideband transitions in a trapped-ion system, can enable the quantum control of both spin and mechanical degrees of freedom and potentially a trapped-ion-like solid-state system for applications in quantum computing. These results establish an experimental platform for spin-based quantum acoustics, bridging the gap between spintronics and quantum acoustics.