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Title: Cooling the motion of diamond nanocrystals in a magneto-gravitational trap in high vacuum

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep30125· OSTI ID:1299202
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  1. Univ. of Pittsburgh, Pittsburgh, PA (United States). Dept. of Physics and Astronomy

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. Furthermore, 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.

Research Organization:
Univ. of Pittsburgh, PA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0006638
OSTI ID:
1299202
Journal Information:
Scientific Reports, Vol. 6; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 53 works
Citation information provided by
Web of Science

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Cited By (18)

Diamonds levitating in a Paul trap under vacuum: Measurements of laser-induced heating via NV center thermometry journal July 2017
Axisymmetric scalable magneto-gravitational trap for diamagnetic particle levitation journal December 2018
Magneto-mechanical trapping of micro-diamonds at low pressures journal February 2019
A microsphere molecule: The interaction of two charged microspheres in a magneto-gravitational trap journal June 2019
Direct loading of nanoparticles under high vacuum into a Paul trap for levitodynamical experiments journal July 2019
Acceleration sensing with magnetically levitated oscillators above a superconductor journal November 2019
Gravitational decoherence journal September 2017
Electron spin resonance from NV centers in diamonds levitating in an ion trap journal March 2017
Pure nanodiamonds for levitated optomechanics in vacuum journal April 2018
Cooling the motion of a silica microsphere in a magneto-gravitational trap in ultra-high vacuum journal June 2018
Stern–Gerlach splitting of low-energy ion beams journal August 2019
Strong coupling between a single nitrogen-vacancy spin and the rotational mode of diamonds levitating in an ion trap journal December 2017
Maximal quantum scattering by homogeneous spherical inclusions journal July 2019
Spin Entanglement Witness for Quantum Gravity journal December 2017
Gravitational Decoherence text January 2017
Cooling the Motion of a Silica Microsphere in a Magneto-Gravitational Trap in Ultra-High Vacuum text January 2018
Acceleration sensing with magnetically levitated oscillators above a superconductor text January 2019
Entanglement, holonomic constraints, and the quantization of fundamental interactions journal August 2019