Coherent Sensing of a Mechanical Resonator with a Single-Spin Qubit
Coherent Sensing of a Mechanical Resonator with a Single-Spin Qubit
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DOI：
10.1126/science.1216821
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发表时间：
2012-03-30
期刊：
影响因子：
56.9
通讯作者：
Lukin, Mikhail D.
中科院分区：
文献类型：
--
作者：
Kolkowitz, Shimon;Jayich, Ania C. Bleszynski;Lukin, Mikhail D.
机械系统可以受到各种各样的小力的影响，从重力到光、电和磁。当机械谐振器被缩小到纳米尺度时，这些力可以被利用来实现与单个量子系统的耦合。我们证明了与金刚石中的氮空位中心相关的单个电子自旋的相干演化可以耦合到磁化机械谐振器的运动。相干操纵的自旋是用来感测驱动和布朗运动的谐振器在环境条件下的精度低于6皮米。随着未来的改进，这种技术可以用来检测机械零点波动，实现强自旋-声子耦合在一个单一的量子水平，并实现量子自旋传感器。
Mechanical systems can be influenced by a wide variety of small forces, ranging from gravitational to optical, electrical, and magnetic. When mechanical resonators are scaled down to nanometer-scale dimensions, these forces can be harnessed to enable coupling to individual quantum systems. We demonstrate that the coherent evolution of a single electronic spin associated with a nitrogen vacancy center in diamond can be coupled to the motion of a magnetized mechanical resonator. Coherent manipulation of the spin is used to sense driven and Brownian motion of the resonator under ambient conditions with a precision below 6 picometers. With future improvements, this technique could be used to detect mechanical zero-point fluctuations, realize strong spin-phonon coupling at a single quantum level, and implement quantum spin transducers.