High-harmonic generation and periodic level crossings: time profile and control
| dc.creator | Faria, C. Figueira de Morisson | |
| dc.creator | Rotter, I | |
| dc.date | 2001-12-21 | |
| dc.date.accessioned | 2026-07-07T05:46:54Z | |
| dc.date.available | 2026-07-07T05:46:54Z | |
| dc.description | We investigate high-harmonic generation in closed systems, using the two-level atom as a simplified model. By means of a windowed Fourier transform of the time-dependent dipole acceleration, we extract the main contributions to this process within a cycle of the driving field. We show that the patterns obtained can be understood by establishing a parallel between the two-level atom and the three-step model. In both models, high-harmonic generation is a consequence of a three-step process, which involves either the continuum and the ground state, or the adiabatic states of the two-level Hamiltonian. The knowledge of this physical mechanism allows us to manipulate the adiabatic states, and consequently the harmonic spectra, by means of a bichromatic driving field. Furthermore, using scaling laws, we establish sharp criteria for the invariance of the physical quantities involved. Consequently, our results can be extended to a broader parameter range, as for instance those characteristic of solid-state systems in strong fields. | |
| dc.description | 17 pages revtex, 15 figures (ps and eps files); figs. 1, 4, 6, 7, 10, 12 and 14 have been compressed due to memory problems | |
| dc.identifier | https://arxiv.org/abs/physics/0112076 | |
| dc.identifier | http://arxiv.org/abs/physics/0112076 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/84511 | |
| dc.subject | Atomic Physics | |
| dc.title | High-harmonic generation and periodic level crossings: time profile and control | |
| dc.type | text |