Breakdown of sequential tunnel ionization in ultrashort electromagnetic pulses
Fuente:
arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866909898909941760 |
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| author | Tyurin, D. I. Strelkov, V. V. Popruzhenko, S. V. |
| author_facet | Tyurin, D. I. Strelkov, V. V. Popruzhenko, S. V. |
| contents | We consider double ionization of negative bromine ion in intense low-frequency electromagnetic fields. By solving numerically the two-electron time-dependent Schr{\" o}dinger equation we demonstrate that while for pulses of a few tens of femtoseconds duration and longer the sequential single-electron approximation perfectly describes the ionization dynamics, for pulses as short as a few femtoseconds this picture breaks down entirely, and the electron-electron interaction suppresses the rate of ionization by roughly one order of magnitude. We also show clear signatures of the collective tunneling effect in the photoelectron density distribution. This counter-intuitive channel of ionization opens up due to the electron-electron repulsion in the direction lateral to the applied electric field. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_20583 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Breakdown of sequential tunnel ionization in ultrashort electromagnetic pulses Tyurin, D. I. Strelkov, V. V. Popruzhenko, S. V. Atomic Physics We consider double ionization of negative bromine ion in intense low-frequency electromagnetic fields. By solving numerically the two-electron time-dependent Schr{\" o}dinger equation we demonstrate that while for pulses of a few tens of femtoseconds duration and longer the sequential single-electron approximation perfectly describes the ionization dynamics, for pulses as short as a few femtoseconds this picture breaks down entirely, and the electron-electron interaction suppresses the rate of ionization by roughly one order of magnitude. We also show clear signatures of the collective tunneling effect in the photoelectron density distribution. This counter-intuitive channel of ionization opens up due to the electron-electron repulsion in the direction lateral to the applied electric field. |
| title | Breakdown of sequential tunnel ionization in ultrashort electromagnetic pulses |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2504.20583 |