Improved delta-kick cooling with multiple non-ideal kicks
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866915286349774848 |
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| author | Neeraj, Harshil Spierings, David C. McGowan, Joseph Mantella, Nicholas Steinberg, Aephraim M. |
| author_facet | Neeraj, Harshil Spierings, David C. McGowan, Joseph Mantella, Nicholas Steinberg, Aephraim M. |
| contents | Delta-kick cooling is a technique employed to achieve low kinetic temperatures by decreasing momentum width at the cost of increased position width. In an ideal implementation, this method uses a harmonic potential to deliver a single near-instantaneous momentum kick. In practice, potentials that are approximately harmonic near their center are commonly used. As a result, the breakdown of the harmonic approximation far from the center limits the cooling performance. Inspired by aberration cancellation in optics, we propose to use compound matter-wave lens systems for $δ-$kick cooling with Gaussian potentials. By strategically combining attractive and repulsive kicks, we show that it is possible to mimic the effect of a harmonic potential. For a test case with reasonable experimental parameters, our method suggests a reduction in kinetic temperature by a factor of $2.5$ using a 2-pulse sequence and by a factor of $3.2$ using a 3-pulse sequence. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_08413 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Improved delta-kick cooling with multiple non-ideal kicks Neeraj, Harshil Spierings, David C. McGowan, Joseph Mantella, Nicholas Steinberg, Aephraim M. Quantum Physics Delta-kick cooling is a technique employed to achieve low kinetic temperatures by decreasing momentum width at the cost of increased position width. In an ideal implementation, this method uses a harmonic potential to deliver a single near-instantaneous momentum kick. In practice, potentials that are approximately harmonic near their center are commonly used. As a result, the breakdown of the harmonic approximation far from the center limits the cooling performance. Inspired by aberration cancellation in optics, we propose to use compound matter-wave lens systems for $δ-$kick cooling with Gaussian potentials. By strategically combining attractive and repulsive kicks, we show that it is possible to mimic the effect of a harmonic potential. For a test case with reasonable experimental parameters, our method suggests a reduction in kinetic temperature by a factor of $2.5$ using a 2-pulse sequence and by a factor of $3.2$ using a 3-pulse sequence. |
| title | Improved delta-kick cooling with multiple non-ideal kicks |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2505.08413 |