We test current numerical implementations of laser-matter interactions by comparison with exact analytical results. Focusing on photon emission processes, it is found that the numerics accurately reproduce analytical emission spectra in all considered regimes, except for the harmonic structures often singled out as the most significant high-intensity (multiphoton) effects. We find that this discrepancy originates in the use of the locally constant field approximation.
|Number of pages||8|
|Journal||Physical Review A (Atomic, Molecular, and Optical Physics)|
|Publication status||Published - 13 Jan 2015|
- PLANE ELECTROMAGNETIC WAVE
- PAIR PRODUCTION
- CONSTANT FIELD
- QUANTUM PROCESSES