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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2506.21341 |
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| _version_ | 1866911071751634944 |
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| author | Melo, Bruno Veldhuizen, Daniel Tomassi, Gregoire F. M. Meyer, Nadine Quidant, Romain |
| author_facet | Melo, Bruno Veldhuizen, Daniel Tomassi, Gregoire F. M. Meyer, Nadine Quidant, Romain |
| contents | We demonstrate coherent, measurement-free optical feedback control of a levitated nanoparticle, achieving phonon occupations down to a few hundred phonons. Unlike measurement-based feedback, this all-optical scheme preserves the correlations between mechanical motion and the feedback signal. Adjustment of the feedback phase and delay provides precise and tunable control over the system dynamics. The ultimate cooling performance is currently limited by phase noise, which we analyze within a theoretical framework that outlines the constraints and prospects for reaching the motional ground state. Our results establish coherent feedback as a powerful tool for quantum control of levitated systems, extending beyond center-of-mass cooling. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_21341 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Cooling of an optically levitated nanoparticle via measurement-free coherent feedback Melo, Bruno Veldhuizen, Daniel Tomassi, Gregoire F. M. Meyer, Nadine Quidant, Romain Quantum Physics Atomic Physics We demonstrate coherent, measurement-free optical feedback control of a levitated nanoparticle, achieving phonon occupations down to a few hundred phonons. Unlike measurement-based feedback, this all-optical scheme preserves the correlations between mechanical motion and the feedback signal. Adjustment of the feedback phase and delay provides precise and tunable control over the system dynamics. The ultimate cooling performance is currently limited by phase noise, which we analyze within a theoretical framework that outlines the constraints and prospects for reaching the motional ground state. Our results establish coherent feedback as a powerful tool for quantum control of levitated systems, extending beyond center-of-mass cooling. |
| title | Cooling of an optically levitated nanoparticle via measurement-free coherent feedback |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2506.21341 |