Spin dynamical decoupling for generating macroscopic superpositions of a free-falling nanodiamond
Spin dynamical decoupling for generating macroscopic superpositions of a free-falling nanodiamond
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DOI：
10.1103/physreva.105.012824
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发表时间：
2021-05
影响因子：
2.9
通讯作者：
B. D. Wood;S. Bose;Gavin W. Morley
中科院分区：
文献类型：
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作者：
B. D. Wood;S. Bose;Gavin W. Morley
含有负电荷氮空位中心的悬浮纳米金刚石(NV−)被认为是产生宏观空间叠加的平台。要做到这一点，需要有较长的NV−自旋相干时间，这就需要制定一种动态去耦合策略，在该策略中，规则自旋fl不会通过非均匀磁fi场中的斯特恩-格拉赫效应抵消叠加的增长。在这里，我们提出了一种方案，将一个直径为250 nm的钻石叠加在一起，空间间隔超过250 nm，同时加入动态去耦合。我们通过让钻石落到2上来实现这一点。4米通过一种磁性构造，包括1。13M在由磁性牙齿产生的不均匀区域中。
Levitated nanodiamonds containing negatively charged nitrogen-vacancy centers (NV − ) have been proposed as a platform to generate macroscopic spatial superpositions. Requirements for this include having a long NV − spin coherence time, which necessitates formulating a dynamical decoupling strategy in which the regular spin flips do not cancel the growth of the superposition through the Stern-Gerlach effect in an inhomogeneous magnetic field. Here, we propose a scheme to place a 250-nm-diameter diamond in a superposition with spatial separation of over 250 nm, while incorporating dynamical decoupling. We achieve this by letting a diamond fall for 2 . 4 m through a magnetic structure, including 1 . 13m in an inhomogeneous region generated by magnetic teeth.