A Sub-kHz Mechanical Resonator Passively Cooled to 6 mK
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arXiv
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866911559143391232 |
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| author | van Everdingen, Loek Plugge, Jaimy Fuchs, Tim van de Stolpe, Guido Benali, Dalal de Jong, Thijmen Bijl, Jasper Bosch, Wim Oosterkamp, Tjerk |
| author_facet | van Everdingen, Loek Plugge, Jaimy Fuchs, Tim van de Stolpe, Guido Benali, Dalal de Jong, Thijmen Bijl, Jasper Bosch, Wim Oosterkamp, Tjerk |
| contents | Highly coherent mechanical resonators are invaluable to ultrasensitive detection techniques by enabling detection of small forces. Studying mechanical resonators in a thermal equilibrium state at millikelvin temperatures provides a promising path to increase their coherence time. Here, we passively cool a 700 Hz massive (1.5 ng) mechanical cantilever down to 6.1(4) mK by means of nuclear demagnetization, as confirmed by detecting its thermal motion via a lock-in based detection scheme. At the lowest temperatures the thermal motion of the resonator is still clearly distinguishable from the background noise. Our data analysis confirms that at these temperatures the motion is still thermally distributed. These results pave the way for passive cooling low-frequency resonators to the sub-millikelvin regime, which would enable new tests of quantum mechanics and advances in ultrasensitive force detection. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_24199 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A Sub-kHz Mechanical Resonator Passively Cooled to 6 mK van Everdingen, Loek Plugge, Jaimy Fuchs, Tim van de Stolpe, Guido Benali, Dalal de Jong, Thijmen Bijl, Jasper Bosch, Wim Oosterkamp, Tjerk Quantum Physics Highly coherent mechanical resonators are invaluable to ultrasensitive detection techniques by enabling detection of small forces. Studying mechanical resonators in a thermal equilibrium state at millikelvin temperatures provides a promising path to increase their coherence time. Here, we passively cool a 700 Hz massive (1.5 ng) mechanical cantilever down to 6.1(4) mK by means of nuclear demagnetization, as confirmed by detecting its thermal motion via a lock-in based detection scheme. At the lowest temperatures the thermal motion of the resonator is still clearly distinguishable from the background noise. Our data analysis confirms that at these temperatures the motion is still thermally distributed. These results pave the way for passive cooling low-frequency resonators to the sub-millikelvin regime, which would enable new tests of quantum mechanics and advances in ultrasensitive force detection. |
| title | A Sub-kHz Mechanical Resonator Passively Cooled to 6 mK |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2510.24199 |