Cooling the Motion of Diamond Nanocrystals in a Magneto-Gravitational Trap in High Vacuum
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...
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| Veröffentlicht in: | Scientific reports 2016-07, Vol.6 (1), p.30125-30125, Article 30125 |
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| creator | Hsu, Jen-Feng Ji, Peng Lewandowski, Charles W. D’Urso, Brian |
| description | 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. |
| doi_str_mv | 10.1038/srep30125 |
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| subjects | 639/766/119 639/766/483/1139 639/925/927 diamagnetic levitation Humanities and Social Sciences MATERIALS SCIENCE multidisciplinary nanodiamond particle PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Science |
| title | Cooling the Motion of Diamond Nanocrystals in a Magneto-Gravitational Trap in High Vacuum |
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