Improved delta-kick cooling with multiple non-ideal kicks

• URL: http://arxiv.org/abs/2505.08413v1
• Date: Tue, 13 May 2025 10:12:24 GMT
• Title: Improved delta-kick cooling with multiple non-ideal kicks
• Authors: Harshil Neeraj, David C. Spierings, Joseph McGowan, Nicholas Mantella, Aephraim M. Steinberg,
• Abstract summary: We show that it is possible to mimic the effect of a harmonic potential by strategically combining attractive and repulsive kicks.<n>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.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: 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 $\delta-$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.

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