arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1603.09243quant-ph
收藏

高真空下冷却纳米金刚石在磁引力阱中的运动

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

Jen-Feng Hsu, Peng Ji, Charles W. Lewandowski, Brian D'Urso

摘要:

高真空中含氮空位的金刚石纳米晶体是一种独特的实验系统,可用于基础量子力学的实验,包括大量子叠加态的产生和量子引力的测试。该系统承诺与其环境极端隔离,同时通过NV中心自旋提供量子控制和传感。虽然光学捕获已经是最探索的悬浮方法,但最近的结果表明,真空下纳米金刚石的过度光学加热可能使该方法对于目前可用的材料不切实际。在这里,我们研究了另一种磁引力陷阱的抗磁性粒子,如金刚石纳米晶体,从大气压到高真空稳定悬浮。来自永磁体的磁场梯度将粒子限制在二维中,而第三维中的限制是重力的。我们证明,反馈冷却的质量中心运动的一个被困的纳米金刚石簇的结果在冷却的一个自由度小于1 K。

英文摘要:

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.

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。

↑