Magneto-mechanical trapping of micro-diamonds at low pressures

M. C. O'Brien, S. Dunn, J. E. Downes, J. Twamley

Research output: Contribution to journalArticleResearchpeer-review

Abstract

A number of quantum technologies require macroscopic mechanical oscillators possessing ultra-high motional Q-factors. These can be used to explore the macroscopic limits of quantum mechanics, to develop quantum sensors and to test the quantum nature of gravity. One approach is to trap nanometer to micron-sized particles in 3D; however, the use of ion or optical traps suffers from a number of difficulties including electrodynamic noise due to patch fields, damage to the particles due to unwanted laser heating, or difficulty in reaching low pressures due to particle loss. In this work, we report a completely passive, magnetic trap which confines a micro-diamond in 3D and which requires no active power - optical or electrical. We design, model, fabricate, and test the operation of our magneto-mechanical trap and experimentally demonstrate trapping down to ∼0.1 Torr. We measure the position fluctuation of the trapped micro-diamond as a function of pressure and find good agreement with Brownian theory.

LanguageEnglish
Article number053103
Pages1-5
Number of pages5
JournalApplied Physics Letters
Volume114
Issue number5
DOIs
Publication statusPublished - 4 Feb 2019

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low pressure
diamonds
trapping
traps
mechanical oscillators
laser heating
electrodynamics
quantum mechanics
Q factors
gravitation
damage
sensors

Cite this

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Magneto-mechanical trapping of micro-diamonds at low pressures. / O'Brien, M. C.; Dunn, S.; Downes, J. E.; Twamley, J.

In: Applied Physics Letters, Vol. 114, No. 5, 053103, 04.02.2019, p. 1-5.

Research output: Contribution to journalArticleResearchpeer-review

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