Normal modes and shockwaves in cold atoms

Francisco Raposo; Hugo Terças

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arXiv · 2506.17404

Normal modes and shockwaves in cold atoms

Francisco Raposo·Hugo Terças

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Abstract

Numerical methods are developed to simulate the dynamics of atoms in a Magneto-Optic Trap (MOT), based on the fluid description of ultracold gases under laser cooling and magnetic trapping forces. With this model, equilibrium hydrostatic profiles and normal modes are calculated, and numerical results are validated against theoretical predictions. As a test case, shock wave formation due to rapid gas expansion and contraction of the ultracold gas is simulated. The latter is caused by a sudden change of the value of its effective collective charge. Limitations of the current methods and future improvements are discussed. This work provides a foundation for studying numerically complex MOT behaviors and their use as analog simulators for astrophysical phenomena.

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Francisco Raposo, Hugo Terças. 2025-06-20. Normal modes and shockwaves in cold atoms. https://arxiv.org/abs/2506.17404

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