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Cooling the Motion of Diamond Nanocrystals in a Magneto-Gravitational Trap in High Vacuum

zqyin 添加于 2016-3-31 09:24 | 1241 次阅读 | 0 个评论

作者
Hsu J-F, Ji P, Lewandowski CW, Brian D\'Urso
摘要
Levitated diamond nanocrystals with nitrogen-vacancy (NV) centres in high vacuum have been proposed as a unique system for experiments in fundamental quantum mechanics, including the generation of large quantum superposition states and tests of quantum gravity. This system promises extreme isolation from its environment while providing quantum control and sensing through the NV centre spin. While optical trapping has been the most explored method of levitation, recent results indicate that excessive optical heating of the nanodiamonds under vacuum may make the method impractical with currently available materials. Here, we study an alternative magneto-gravitational trap for diamagnetic particles, such as diamond nanocrystals, with stable levitation from atmospheric pressure to high vacuum. Magnetic field gradients from permanent magnets confine the particle in two dimensions, while confinement in the third dimension is gravitational. We demonstrate that feedback cooling of the centre-of-mass motion of a trapped nanodiamond cluster results in cooling of one degree of freedom to less than 1 K.
详细资料
- 关键词: quant-ph
- 文献种类:手稿
- 期卷页: 2016年
- 日期: 2016-3-30
- 发布方式: arXiv e-prints
- 备注:arXiv:1603.09243v1; 8 pages, 5 figures, and 2 pages of supplementary information
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