Efficient Readout of a Single Spin State in Diamond via Spin-to-Charge Conversion
Efficient Readout of a Single Spin State in Diamond via Spin-to-Charge Conversion
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DOI：
10.1103/physrevlett.114.136402
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发表时间：
2015-03-31
影响因子：
8.6
通讯作者：
Lukin, M. D.
中科院分区：
文献类型：
--
作者：
Shields, B. J.;Unterreithmeier, Q. P.;Lukin, M. D.
有效地读出固体中与原子样杂质相关的单个电子自旋对于量子信息处理和量子计量的应用至关重要。我们展示了一种有效读出金刚石中氮空位（NV）中心自旋的新方法。该方法基于将NV的电子自旋态转换为电荷态分布，然后单次读出电荷态。转换是通过一个自旋相关的光电离过程在金刚石在室温下实现的。在纳米金刚石光束中使用nv，我们证明了由此产生的自旋读出噪声在自旋投影噪声水平的3倍之内。讨论了该技术在纳米级磁传感中的应用。
Efficient readout of individual electronic spins associated with atomlike impurities in the solid state is essential for applications in quantum information processing and quantum metrology. We demonstrate a new method for efficient spin readout of nitrogen-vacancy (NV) centers in diamond. The method is based on conversion of the electronic spin state of the NV to a charge-state distribution, followed by single-shot readout of the charge state. Conversion is achieved through a spin-dependent photoionization process in diamond at room temperature. Using NVs in nanofabricated diamond beams, we demonstrate that the resulting spin readout noise is within a factor of 3 of the spin projection noise level. Applications of this technique for nanoscale magnetic sensing are discussed.