Spin coherent quantum transport of electrons between defects in diamond
Spin coherent quantum transport of electrons between defects in diamond
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DOI：
10.1515/nanoph-2019-0144
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发表时间：
2019-05
期刊：
影响因子：
7.5
通讯作者：
L. Oberg;E. Huang;P. Reddy;A. Alkauskas;A. Greentree;J. Cole;N. Manson;C. Meriles;M. Doherty
中科院分区：
文献类型：
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作者：
L. Oberg;E. Huang;P. Reddy;A. Alkauskas;A. Greentree;J. Cole;N. Manson;C. Meriles;M. Doherty
摘要金刚石中的氮空位色心作为一种重要的固态量子信息处理系统，已迅速发展起来。虽然单个自旋寄存器已被用于实现小规模钻石量子计算，但大规模设备的实现需要开发用于在远距离量子位之间传输信息的片上量子总线。在这里，我们提出了一种方法，在遥远的NV中心之间的电子和它的自旋态的相干量子输运。通过对金刚石纳米结构的NV中心电荷态和受限导电态的光学控制，实现空间受激绝热拉曼通道来实现传输。我们的模型表明，对于金刚石纳米线中的两个NV中心，高保真传输可以在数百纳米量级的距离上实现，时间尺度为数百纳秒量级。因此，空间绝热通道是实现片上自旋量子总线的一个有前途的选择。
Abstract The nitrogen-vacancy (NV) color center in diamond has rapidly emerged as an important solid-state system for quantum information processing. Whereas individual spin registers have been used to implement small-scale diamond quantum computing, the realization of a large-scale device requires the development of an on-chip quantum bus for transporting information between distant qubits. Here, we propose a method for coherent quantum transport of an electron and its spin state between distant NV centers. Transport is achieved by the implementation of spatial stimulated adiabatic Raman passage through the optical control of the NV center charge states and the confined conduction states of a diamond nanostructure. Our models show that, for two NV centers in a diamond nanowire, high-fidelity transport can be achieved over distances of order hundreds of nanometers in timescales of order hundreds of nanoseconds. Spatial adiabatic passage is therefore a promising option for realizing an on-chip spin quantum bus.