Ultracoherent self-assembled diamond nanomechanics reveals superfluid dynamics
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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_ | 1866917271424729088 |
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| author | Huang, Guanhao Jin, Chang Ding, Sophie Weiyi Zhang, Chaoshen Day, Aaron M. Elbs, Tobias Sinclair, Neil Joshi, Sukhad Dnyanesh Defo, Rodrick Kuate Halperin, Bertrand I. Hu, Evelyn Lončar, Marko |
| author_facet | Huang, Guanhao Jin, Chang Ding, Sophie Weiyi Zhang, Chaoshen Day, Aaron M. Elbs, Tobias Sinclair, Neil Joshi, Sukhad Dnyanesh Defo, Rodrick Kuate Halperin, Bertrand I. Hu, Evelyn Lončar, Marko |
| contents | From gravitational-wave detection, protein force microscopy, to exploration of quantum-classical boundaries, many anticipated discoveries in fundamental science require improving measurement sensitivity limits. Through the fluctuation-dissipation theorem, mechanical dissipation sets the acoustic noise for this limit. Yet, even in high-purity crystals, the microscopic mechanisms responsible for the acoustic loss remain poorly understood. Tension-induced dissipation dilution offers a route to ultralow acoustic loss, but is challenging to implement in crystalline materials including single-crystal diamond. Here we realize a strain-engineered diamond nanomechanical platform using a liquid-assisted van der Waals self-assembly process that harnesses intrinsic surface forces to apply tensile stress exceeding 1 GPa. At cryogenic temperatures these resonators achieve quality factors beyond 10 billion (intrinsic material quality factors beyond 100 million). This exceptional coherence turns them into a sensitive probe for residual dissipation, elucidating three distinct two-level-system channels and one topological dissipation channel from a surface superfluid helium film. Our work shows how advancing mechanical coherence opens access to new regimes of physics in hybrid quantum systems, precision metrology, and condensed-matter physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_01217 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ultracoherent self-assembled diamond nanomechanics reveals superfluid dynamics Huang, Guanhao Jin, Chang Ding, Sophie Weiyi Zhang, Chaoshen Day, Aaron M. Elbs, Tobias Sinclair, Neil Joshi, Sukhad Dnyanesh Defo, Rodrick Kuate Halperin, Bertrand I. Hu, Evelyn Lončar, Marko Mesoscale and Nanoscale Physics Materials Science Quantum Physics From gravitational-wave detection, protein force microscopy, to exploration of quantum-classical boundaries, many anticipated discoveries in fundamental science require improving measurement sensitivity limits. Through the fluctuation-dissipation theorem, mechanical dissipation sets the acoustic noise for this limit. Yet, even in high-purity crystals, the microscopic mechanisms responsible for the acoustic loss remain poorly understood. Tension-induced dissipation dilution offers a route to ultralow acoustic loss, but is challenging to implement in crystalline materials including single-crystal diamond. Here we realize a strain-engineered diamond nanomechanical platform using a liquid-assisted van der Waals self-assembly process that harnesses intrinsic surface forces to apply tensile stress exceeding 1 GPa. At cryogenic temperatures these resonators achieve quality factors beyond 10 billion (intrinsic material quality factors beyond 100 million). This exceptional coherence turns them into a sensitive probe for residual dissipation, elucidating three distinct two-level-system channels and one topological dissipation channel from a surface superfluid helium film. Our work shows how advancing mechanical coherence opens access to new regimes of physics in hybrid quantum systems, precision metrology, and condensed-matter physics. |
| title | Ultracoherent self-assembled diamond nanomechanics reveals superfluid dynamics |
| topic | Mesoscale and Nanoscale Physics Materials Science Quantum Physics |
| url | https://arxiv.org/abs/2507.01217 |