Prototype Superfluid Gravitational Wave Detector
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2021
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| _version_ | 1866929680225927168 |
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| author | Vadakkumbatt, V. Hirschel, M. Manley, J. Clark, T. J. Singh, S. Davis, J. P. |
| author_facet | Vadakkumbatt, V. Hirschel, M. Manley, J. Clark, T. J. Singh, S. Davis, J. P. |
| contents | We study a cross-shaped cavity filled with superfluid $^4$He as a prototype resonant-mass gravitational wave detector. Using a membrane and a re-entrant microwave cavity as a sensitive optomechanical transducer, we were able to observe the thermally excited high-$Q$ acoustic modes of the helium at 20 mK temperature and achieved a strain sensitivity of $8 \times 10^{-19}$ Hz$^{-1/2}$ to gravitational waves. To facilitate the broadband detection of continuous gravitational waves, we tune the kilohertz-scale mechanical resonance frequencies up to 173 Hz/bar by pressurizing the helium. With reasonable improvements, this architecture will enable the search for GWs in the 1-30 kHz range, relevant for a number of astrophysical sources both within and beyond the Standard Model. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2107_00120 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Prototype Superfluid Gravitational Wave Detector Vadakkumbatt, V. Hirschel, M. Manley, J. Clark, T. J. Singh, S. Davis, J. P. General Relativity and Quantum Cosmology Instrumentation and Methods for Astrophysics Other Condensed Matter Quantum Physics We study a cross-shaped cavity filled with superfluid $^4$He as a prototype resonant-mass gravitational wave detector. Using a membrane and a re-entrant microwave cavity as a sensitive optomechanical transducer, we were able to observe the thermally excited high-$Q$ acoustic modes of the helium at 20 mK temperature and achieved a strain sensitivity of $8 \times 10^{-19}$ Hz$^{-1/2}$ to gravitational waves. To facilitate the broadband detection of continuous gravitational waves, we tune the kilohertz-scale mechanical resonance frequencies up to 173 Hz/bar by pressurizing the helium. With reasonable improvements, this architecture will enable the search for GWs in the 1-30 kHz range, relevant for a number of astrophysical sources both within and beyond the Standard Model. |
| title | Prototype Superfluid Gravitational Wave Detector |
| topic | General Relativity and Quantum Cosmology Instrumentation and Methods for Astrophysics Other Condensed Matter Quantum Physics |
| url | https://arxiv.org/abs/2107.00120 |