Chaotic scattering and heating in cold ion-atom collisions: two sides of the same coin
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arXiv
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| Natura: | Preprint |
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2025
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| _version_ | 1866918263699537920 |
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| author | Chowdhury, Saajid Ríos, Jesús Pérez |
| author_facet | Chowdhury, Saajid Ríos, Jesús Pérez |
| contents | We study the classical dynamics of a Paul-trapped ion in a low-density bath of atoms above 1 $μ\textrm{K}$. We find that lower energy collisions with more massive atoms, especially at energies less than the initial micromotion heating, are more likely to form atom-ion complexes. These complexes evolve in a fractal structure for every scattering observable, showing non-hyperbolic chaotic dynamics. To explore the chaotic dynamics, we use a GPU-accelerated methodology allowing us to run over $3\times 10^{8}$ trajectories of a $^{174}$Yb$^+$ and different atoms. As a result, after analyzing the dynamics as a function of the atom species, collision energy, trap parameters, and ion-atom potential depth, we find a link between heating and the onset of chaos in the first atom-ion interaction that occurs when a low-density atomic bath is merged with a trapped ion. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_15117 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Chaotic scattering and heating in cold ion-atom collisions: two sides of the same coin Chowdhury, Saajid Ríos, Jesús Pérez Atomic Physics Chaotic Dynamics Chemical Physics We study the classical dynamics of a Paul-trapped ion in a low-density bath of atoms above 1 $μ\textrm{K}$. We find that lower energy collisions with more massive atoms, especially at energies less than the initial micromotion heating, are more likely to form atom-ion complexes. These complexes evolve in a fractal structure for every scattering observable, showing non-hyperbolic chaotic dynamics. To explore the chaotic dynamics, we use a GPU-accelerated methodology allowing us to run over $3\times 10^{8}$ trajectories of a $^{174}$Yb$^+$ and different atoms. As a result, after analyzing the dynamics as a function of the atom species, collision energy, trap parameters, and ion-atom potential depth, we find a link between heating and the onset of chaos in the first atom-ion interaction that occurs when a low-density atomic bath is merged with a trapped ion. |
| title | Chaotic scattering and heating in cold ion-atom collisions: two sides of the same coin |
| topic | Atomic Physics Chaotic Dynamics Chemical Physics |
| url | https://arxiv.org/abs/2509.15117 |