Spin angular momentum and mechanical rotation both contribute to the total angular momentum of rigid bodies, leading to spin-rotational coupling via the Einstein–de Haas and Barnett effects. Here, we show that the revolutions of symmetric nanorotors can be strongly affected by a small number of intrinsic spins. The resulting dynamics are observable with freely rotating nanodiamonds with embedded nitrogen-vacancy centers and persist for realistically shaped near-symmetric particles, opening the door to torque-free schemes to control their rotations at the quantum level.

中文翻译：

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通过嵌入自旋无扭矩操纵纳米粒子旋转

自旋角动量和机械旋转都对刚体的总角动量有贡献，通过爱因斯坦-德哈斯和巴尼特效应导致自旋-旋转耦合。在这里，我们表明对称纳米转子的旋转会受到少量本征自旋的强烈影响。由此产生的动力学可以通过带有嵌入氮空位中心的自由旋转纳米金刚石观察到，并且对于逼真形状的近对称粒子持续存在，为无扭矩方案打开了大门，以在量子水平上控制它们的旋转。