Flattening a trapped atomic gas using a programmable optical potential in a feedback loop
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866913292607291392 |
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| author | Kim, Sol Lee, Kyuhwan Kim, Jongmin Shin, Y. |
| author_facet | Kim, Sol Lee, Kyuhwan Kim, Jongmin Shin, Y. |
| contents | We present a method for producing a flat, large-area Fermi gas of $^6$Li with a uniform area density. The method uses a programmable optical potential within a feedback loop to flatten the in-plane trapping potential for atoms. The optical potential is generated using a laser beam, whose intensity profile is adjusted by a spatial light modulator and optimized through measurements of the density distribution of the sample. The resulting planar sample exhibits a uniform area density within a region of about 480 $μ$m in diameter and the standard deviation of the trap bottom potential is estimated to be $\approx k_B \times$ 6.1 nK, which is less than 20$\%$ of the transverse confinement energy. We discuss a dimensional crossover toward 2D regime by reducing the number of atoms in the planar trap, including the effect of the spatial variation of the transverse trapping frequency in the large-area sample. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_00238 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Flattening a trapped atomic gas using a programmable optical potential in a feedback loop Kim, Sol Lee, Kyuhwan Kim, Jongmin Shin, Y. Quantum Gases We present a method for producing a flat, large-area Fermi gas of $^6$Li with a uniform area density. The method uses a programmable optical potential within a feedback loop to flatten the in-plane trapping potential for atoms. The optical potential is generated using a laser beam, whose intensity profile is adjusted by a spatial light modulator and optimized through measurements of the density distribution of the sample. The resulting planar sample exhibits a uniform area density within a region of about 480 $μ$m in diameter and the standard deviation of the trap bottom potential is estimated to be $\approx k_B \times$ 6.1 nK, which is less than 20$\%$ of the transverse confinement energy. We discuss a dimensional crossover toward 2D regime by reducing the number of atoms in the planar trap, including the effect of the spatial variation of the transverse trapping frequency in the large-area sample. |
| title | Flattening a trapped atomic gas using a programmable optical potential in a feedback loop |
| topic | Quantum Gases |
| url | https://arxiv.org/abs/2404.00238 |