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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/2506.19739 |
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| _version_ | 1866911142288293888 |
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| author | Thomas, Ryan J. McMahon, Jordan A. Mehdi, Zain Szigeti, Stuart S. Haine, Simon A. Legge, Samuel Close, John D. Hope, Joseph J. |
| author_facet | Thomas, Ryan J. McMahon, Jordan A. Mehdi, Zain Szigeti, Stuart S. Haine, Simon A. Legge, Samuel Close, John D. Hope, Joseph J. |
| contents | We experimentally demonstrate cavity-free feedback cooling of the three lowest-lying collective modes of a Bose-Einstein condensate in a prolate harmonic trap. Using shadowgraph imaging as an in situ probe of the atomic density, we measure the time-dependent centers of mass and widths of the condensate in two dimensions and use these measurements to damp oscillations in the two visible dipole modes and the low-frequency quadrupole mode. By inducing oscillations in the condensate, we show that we can efficiently damp the dipole modes to a final mean phonon occupancy per atom of $<1$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_19739 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Multimode feedback cooling of the collective modes of a Bose-Einstein condensate Thomas, Ryan J. McMahon, Jordan A. Mehdi, Zain Szigeti, Stuart S. Haine, Simon A. Legge, Samuel Close, John D. Hope, Joseph J. Quantum Physics We experimentally demonstrate cavity-free feedback cooling of the three lowest-lying collective modes of a Bose-Einstein condensate in a prolate harmonic trap. Using shadowgraph imaging as an in situ probe of the atomic density, we measure the time-dependent centers of mass and widths of the condensate in two dimensions and use these measurements to damp oscillations in the two visible dipole modes and the low-frequency quadrupole mode. By inducing oscillations in the condensate, we show that we can efficiently damp the dipole modes to a final mean phonon occupancy per atom of $<1$. |
| title | Multimode feedback cooling of the collective modes of a Bose-Einstein condensate |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2506.19739 |