dorsal/arxiv
View SchemaA two-dimensional, two-electron model atom in a laser pulse: exact treatment, single active electron-analysis, time-dependent density functional theory, classical calculations, and non-sequential ionization
| Authors | D. Bauer |
|---|---|
| Categories | |
| ArXiv ID | physics/9712031 |
| URL | https://arxiv.org/abs/physics/9712031 |
| DOI | 10.1103/PhysRevA.56.3028 |
| Journal | Phys. Rev. A 56, 3028 (1997) |
Abstract
Owing to its numerical simplicity, a two-dimensional two-electron model atom, with each electron moving in one direction, is an ideal system to study non-perturbatively a fully correlated atom exposed to a laser field. Frequently made assumptions, such as the ``single active electron''- approach and calculational approximations, e.g. time dependent density functional theory or (semi-) classical techniques, can be tested. In this paper we examine the multiphoton short pulse-regime. We observe ``non-sequential'' ionization, i.e.\ double ionization at lower field strengths as expected from a sequential, single active electron-point of view. Since we find non-sequential ionization also in purely classical simulations, we are able to clarify the mechanism behind this effect in terms of single particle trajectories. PACS Number(s): 32.80.Rm
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"abstract": "Owing to its numerical simplicity, a two-dimensional two-electron model atom,\nwith each electron moving in one direction, is an ideal system to study\nnon-perturbatively a fully correlated atom exposed to a laser field. Frequently\nmade assumptions, such as the ``single active electron\u0027\u0027- approach and\ncalculational approximations, e.g. time dependent density functional theory or\n(semi-) classical techniques, can be tested. In this paper we examine the\nmultiphoton short pulse-regime. We observe ``non-sequential\u0027\u0027 ionization, i.e.\\\ndouble ionization at lower field strengths as expected from a sequential,\nsingle active electron-point of view. Since we find non-sequential ionization\nalso in purely classical simulations, we are able to clarify the mechanism\nbehind this effect in terms of single particle trajectories. PACS Number(s):\n32.80.Rm",
"arxiv_id": "physics/9712031",
"authors": [
"D. Bauer"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevA.56.3028",
"journal_ref": "Phys. Rev. A 56, 3028 (1997)",
"title": "A two-dimensional, two-electron model atom in a laser pulse: exact treatment, single active electron-analysis, time-dependent density functional theory, classical calculations, and non-sequential ionization",
"url": "https://arxiv.org/abs/physics/9712031"
},
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