dorsal/arxiv
View SchemaExact Solution for a Two-Level Atom in Radiation Fields and the Freeman Resonances
| Authors | Dong-Sheng Guo, Yong-Shi Wu, Linn Van Woerkom |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0509135 |
| URL | https://arxiv.org/abs/quant-ph/0509135 |
| DOI | 10.1103/PhysRevA.73.023419 |
Abstract
Using techniques of complex analysis in an algebraic approach, we solve the wave equation for a two-level atom interacting with a monochromatic light field exactly. A closed-form expression for the quasi-energies is obtained, which shows that the Bloch-Siegert shift is always finite, regardless of whether the original or the shifted level spacing is an integral multiple of the driving frequency, $\omega$. We also find that the wave functions, though finite when the original level spacing is an integral multiple of $\omega$, become divergent when the intensity-dependent shifted energy spacing is an integral multiple of the photon energy. This result provides, for the first time in the literature, an ab-initio theoretical explanation for the occurrence of the Freeman resonances observed in above-threshold ionization experiments.
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"abstract": "Using techniques of complex analysis in an algebraic approach, we solve the\nwave equation for a two-level atom interacting with a monochromatic light field\nexactly. A closed-form expression for the quasi-energies is obtained, which\nshows that the Bloch-Siegert shift is always finite, regardless of whether the\noriginal or the shifted level spacing is an integral multiple of the driving\nfrequency, $\\omega$. We also find that the wave functions, though finite when\nthe original level spacing is an integral multiple of $\\omega$, become\ndivergent when the intensity-dependent shifted energy spacing is an integral\nmultiple of the photon energy. This result provides, for the first time in the\nliterature, an ab-initio theoretical explanation for the occurrence of the\nFreeman resonances observed in above-threshold ionization experiments.",
"arxiv_id": "quant-ph/0509135",
"authors": [
"Dong-Sheng Guo",
"Yong-Shi Wu",
"Linn Van Woerkom"
],
"categories": [
"quant-ph",
"physics.atom-ph",
"physics.optics"
],
"doi": "10.1103/PhysRevA.73.023419",
"title": "Exact Solution for a Two-Level Atom in Radiation Fields and the Freeman Resonances",
"url": "https://arxiv.org/abs/quant-ph/0509135"
},
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