Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2506.03803 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866916781695696896 |
|---|---|
| author | Chen, Xianfeng Raj, Nirmala Lecamwasam, Ruvi Chen, Mingxi Tan, Christina Yuan Ling Assad, Syed M. Lam, Ping Koy |
| author_facet | Chen, Xianfeng Raj, Nirmala Lecamwasam, Ruvi Chen, Mingxi Tan, Christina Yuan Ling Assad, Syed M. Lam, Ping Koy |
| contents | Low-dissipation rotors with large angular momentum are essential for precision sensing and probing macroscopic quantum phenomena. To date, low dissipation can only be achieved for micro-scale rotors. Here, we report a diamagnetically levitated millimeter-scale rotor exhibiting a measured dissipation rate as low as $3.85\,μ\mathrm{Hz}$ at room temperature, corresponding to a free spinning duration exceeding 10 hours. The rotor is levitated stably over an axisymmetric permanent magnet trap, and can be driven up to 930 RPM using contactless electrostatic actuation in high vacuum. Leveraging its low damping rate and large angular momentum, we realize a precision gyroscope with a measured sensitivity of $6.5 \times 10^{-3}\ \mathrm{^\circ/s}$ and an estimated thermal-limited stability of $5.7 \times 10^{-7}\ \mathrm{^\circ/\sqrt{h}}$. These results establish diamagnetic levitation as a promising room-temperature platform for high-performance gyroscopes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_03803 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Levitated macroscopic rotors with 10 hours of free spin at room temperature Chen, Xianfeng Raj, Nirmala Lecamwasam, Ruvi Chen, Mingxi Tan, Christina Yuan Ling Assad, Syed M. Lam, Ping Koy Applied Physics Low-dissipation rotors with large angular momentum are essential for precision sensing and probing macroscopic quantum phenomena. To date, low dissipation can only be achieved for micro-scale rotors. Here, we report a diamagnetically levitated millimeter-scale rotor exhibiting a measured dissipation rate as low as $3.85\,μ\mathrm{Hz}$ at room temperature, corresponding to a free spinning duration exceeding 10 hours. The rotor is levitated stably over an axisymmetric permanent magnet trap, and can be driven up to 930 RPM using contactless electrostatic actuation in high vacuum. Leveraging its low damping rate and large angular momentum, we realize a precision gyroscope with a measured sensitivity of $6.5 \times 10^{-3}\ \mathrm{^\circ/s}$ and an estimated thermal-limited stability of $5.7 \times 10^{-7}\ \mathrm{^\circ/\sqrt{h}}$. These results establish diamagnetic levitation as a promising room-temperature platform for high-performance gyroscopes. |
| title | Levitated macroscopic rotors with 10 hours of free spin at room temperature |
| topic | Applied Physics |
| url | https://arxiv.org/abs/2506.03803 |