Giant Enhancement of Vacuum Friction in Spinning YIG Nanospheres
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866910439857717248 |
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| author | Khosravi, Farhad Sun, Wenbo Khandekar, Chinmay Li, Tongcang Jacob, Zubin |
| author_facet | Khosravi, Farhad Sun, Wenbo Khandekar, Chinmay Li, Tongcang Jacob, Zubin |
| contents | Experimental observations of vacuum radiation and vacuum frictional torque are challenging due to their vanishingly small effects in practical systems. For example, a rotating nanosphere in free space slows down due to friction from vacuum fluctuations with a stopping time around the age of the universe. Here, we show that a spinning yttrium iron garnet (YIG) nanosphere near aluminum or YIG slabs exhibits vacuum radiation eight orders of magnitude larger than other metallic or dielectric spinning nanospheres. We achieve this giant enhancement by exploiting the large near-field magnetic local density of states in YIG systems, which occurs in the low-frequency GHz regime comparable to the rotation frequency. Furthermore, we propose a realistic experimental setup for observing the effects of this large vacuum radiation and frictional torque under experimentally accessible conditions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_09563 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Giant Enhancement of Vacuum Friction in Spinning YIG Nanospheres Khosravi, Farhad Sun, Wenbo Khandekar, Chinmay Li, Tongcang Jacob, Zubin Quantum Physics Mesoscale and Nanoscale Physics Optics Experimental observations of vacuum radiation and vacuum frictional torque are challenging due to their vanishingly small effects in practical systems. For example, a rotating nanosphere in free space slows down due to friction from vacuum fluctuations with a stopping time around the age of the universe. Here, we show that a spinning yttrium iron garnet (YIG) nanosphere near aluminum or YIG slabs exhibits vacuum radiation eight orders of magnitude larger than other metallic or dielectric spinning nanospheres. We achieve this giant enhancement by exploiting the large near-field magnetic local density of states in YIG systems, which occurs in the low-frequency GHz regime comparable to the rotation frequency. Furthermore, we propose a realistic experimental setup for observing the effects of this large vacuum radiation and frictional torque under experimentally accessible conditions. |
| title | Giant Enhancement of Vacuum Friction in Spinning YIG Nanospheres |
| topic | Quantum Physics Mesoscale and Nanoscale Physics Optics |
| url | https://arxiv.org/abs/2401.09563 |