Local dynamics in high-order harmonic generation using Bohmian trajectories
| Autor: | B. B. Augstein, Jie Wu, C. Figueira de Morisson Faria |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Physics
Chemical Physics (physics.chem-ph) Quantum Physics Atomic Physics (physics.atom-ph) Perspective (graphical) Phase (waves) FOS: Physical sciences Atomic and Molecular Physics and Optics Physics::History of Physics Physics - Atomic Physics Core (optical fiber) General Relativity and Quantum Cosmology Classical mechanics Flow (mathematics) Quantum mechanics Physics - Chemical Physics Trajectory High harmonic generation Wave function Quantum Physics (quant-ph) Quantum Optics (physics.optics) Physics - Optics |
| Popis: | We investigate high-order harmonic generation from a Bohmian-mechanical perspective, and find that the innermost part of the core, represented by a single Bohmian trajectory, leads to the main contributions to the high-harmonic spectra. Using time-frequency analysis, we associate this central Bohmian trajectory to an ensemble of unbound classical trajectories leaving and returning to the core, in agreement with the three step model. In the Bohmian scenario, this physical picture builds up non-locally near the core via the quantum mechanical phase of the wavefunction. This implies that the flow of the wavefunction far from the core alters the central Bohmian trajectory. We also show how this phase degrades in time for the peripheral Bohmian trajectories as they leave the core region. 7 pages, 3 figures; the manuscript has been considerably extended and modified with regard to the previous versions |
| Databáze: | OpenAIRE |
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