Coulomb-corrected strong-field quantum trajectories beyond dipole approximation
| Autor: | Dieter Bauer, Th. Keil |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Quantum Physics Atomic Physics (physics.atom-ph) Equations of motion FOS: Physical sciences Electron Discrete dipole approximation Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Physics - Atomic Physics 010305 fluids & plasmas Momentum Coulomb's law symbols.namesake Dipole Quantum electrodynamics 0103 physical sciences symbols Coulomb 010306 general physics Quantum Physics (quant-ph) Lepton |
| DOI: | 10.48550/arxiv.1708.00429 |
| Popis: | Non-dipole effects in strong-field photoelectron momentum spectra have been revealed experimentally [C.T.L. Smeenk et al., Phys. Rev. Lett. 106, 193002 (2011); A. Ludwig et al., Phys. Rev. Lett. 113, 243001 (2014)]. For certain laser parameters and photoelectron momenta the spectra were found to be shifted against the laser propagation direction whereas one would naively assume that the radiation pressure due to the $\vec{v}\times\vec{B}$-force pushes electrons always in propagation direction. Only the interplay between Lorentz and Coulomb force may give rise to such counterintuitive dynamics. In this work, we calculate the momentum-dependent shift in and against the propagation direction by extending the quantum trajectory-based Coulomb-corrected strong-field approximation beyond the dipole approximation. A semi-analytical treatment where both magnetic and Coulomb force are treated perturbatively but simultaneously reproduces the results from the full numerical solution of the equations of motion. Comment: 6 pages, 5 figures, REVTeX 4.1 |
| Databáze: | OpenAIRE |
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