Fundamental Limits of Feedback Cooling Ultracold Atomic Gases
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2023
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| _version_ | 1866909222637142016 |
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| author | Mehdi, Zain Haine, Simon A. Hope, Joseph J. Szigeti, Stuart S. |
| author_facet | Mehdi, Zain Haine, Simon A. Hope, Joseph J. Szigeti, Stuart S. |
| contents | We investigate the fundamental viability of cooling ultracold atomic gases with quantum feedback control. Our study shows that the trade-off between the resolution and destructiveness of optical imaging techniques imposes constraints on the efficacy of feedback cooling, and that rapid rethermalization is necessary for cooling thermal gases. We construct a simple model to determine the limits to feedback cooling set by the visibility of density fluctuations, measurement-induced heating, and three-body atomic recombination. We demonstrate that feedback control can rapidly cool high-temperature thermal clouds in quasi-2D geometries to degenerate temperatures with minimal atom loss compared to traditional evaporation. Our analysis confirms the feasibility of feedback cooling ultracold atomic gases, providing a pathway to new regimes of cooling not achievable with current approaches. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_09846 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Fundamental Limits of Feedback Cooling Ultracold Atomic Gases Mehdi, Zain Haine, Simon A. Hope, Joseph J. Szigeti, Stuart S. Quantum Gases Quantum Physics We investigate the fundamental viability of cooling ultracold atomic gases with quantum feedback control. Our study shows that the trade-off between the resolution and destructiveness of optical imaging techniques imposes constraints on the efficacy of feedback cooling, and that rapid rethermalization is necessary for cooling thermal gases. We construct a simple model to determine the limits to feedback cooling set by the visibility of density fluctuations, measurement-induced heating, and three-body atomic recombination. We demonstrate that feedback control can rapidly cool high-temperature thermal clouds in quasi-2D geometries to degenerate temperatures with minimal atom loss compared to traditional evaporation. Our analysis confirms the feasibility of feedback cooling ultracold atomic gases, providing a pathway to new regimes of cooling not achievable with current approaches. |
| title | Fundamental Limits of Feedback Cooling Ultracold Atomic Gases |
| topic | Quantum Gases Quantum Physics |
| url | https://arxiv.org/abs/2306.09846 |