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arXiv 1706.04779quant-ph
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具有连续动态解耦的高频场的窄带传感

Narrow-bandwidth sensing of high-frequency fields with continuous dynamical decoupling

Alexander Stark, Nati Aharon, Thomas Unden, Daniel Louzon, Alexander Huck, Alex Retzker, Ulrik Lund Andersen, Fedor Jelezko

摘要:

用于感测弱AC场的现有技术方法仅在低频域(< 10 MHz)中有效。感测高频信号的低效率是由于缺乏使用动态解耦的能力。在本文中,我们表明,动态解耦可以被纳入到高频率感测计划,并通过这一点,我们证明了低频率实现的高灵敏度可以扩展到整个频谱。虽然我们的方案是通用的,适用于各种原子和固态系统,我们实验证明它与金刚石中的氮空位中心。对于天然丰度为$^{13}$ C的金刚石,我们实现了高达1.43 ms的相干时间,导致在1.6 GHz下最小可检测的磁场强度为4 nT。由于我们的计划的固有性质,我们观察到由于信号本身的相干时间的额外增加。

英文摘要:

State-of-the-art methods for sensing weak AC fields are only efficient in the low frequency domain (< 10 MHz). The inefficiency of sensing high frequency signals is due to the lack of ability to use dynamical decoupling. In this paper we show that dynamical decoupling can be incorporated into high frequency sensing schemes and by this we demonstrate that the high sensitivity achieved for low frequency can be extended to the whole spectrum. While our scheme is general and suitable to a variety of atomic and solid-state systems, we experimentally demonstrate it with the nitrogen-vacancy center in diamond. For a diamond with natural abundance of $^{13}$C we achieve coherence times up to 1.43 ms resulting in a smallest detectable magnetic field strength of 4 nT at 1.6 GHz. Attributed to the inherent nature of our scheme, we observe an additional increase in coherence time due to the signal itself.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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