Backaction suppression in levitated optomechanics using reflective boundaries
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arXiv
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866913807097397248 |
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| author | Gajewski, Rafał Bateman, James |
| author_facet | Gajewski, Rafał Bateman, James |
| contents | We show theoretically that the noise due to laser induced backaction acting on a small nanosphere levitated in a standing-wave trap can be considerably reduced by utilising a suitable reflective boundary. We examine the spherical mirror geometry as a case study of this backaction suppression effect, discussing the theoretical and experimental constraints. We study the effects of laser recoil directly, by analysing optical force fluctuations acting on a dipolar particle trapped at the centre of a spherical mirror. We also compute the corresponding measurement imprecision in an interferometric, shot-noise-limited position measurement, using the formalism of Fisher information flow. Our results show that the standing-wave trapping field is necessary for backaction suppression in three dimensions, and they satisfy the Heisenberg limit of detection. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_04366 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Backaction suppression in levitated optomechanics using reflective boundaries Gajewski, Rafał Bateman, James Optics Quantum Physics We show theoretically that the noise due to laser induced backaction acting on a small nanosphere levitated in a standing-wave trap can be considerably reduced by utilising a suitable reflective boundary. We examine the spherical mirror geometry as a case study of this backaction suppression effect, discussing the theoretical and experimental constraints. We study the effects of laser recoil directly, by analysing optical force fluctuations acting on a dipolar particle trapped at the centre of a spherical mirror. We also compute the corresponding measurement imprecision in an interferometric, shot-noise-limited position measurement, using the formalism of Fisher information flow. Our results show that the standing-wave trapping field is necessary for backaction suppression in three dimensions, and they satisfy the Heisenberg limit of detection. |
| title | Backaction suppression in levitated optomechanics using reflective boundaries |
| topic | Optics Quantum Physics |
| url | https://arxiv.org/abs/2405.04366 |