Strong field ionization and gauge dependence of nonlocal potentials
arXiv:1609.02551 · doi:10.1103/PhysRevA.94.063407
Abstract
Nonlocal potential models have been used in place of the Coulomb potential in the Schrodinger equation as an efficient means of exploring high field laser-atom interaction in previous works. Al- though these models have found use in modeling phenomena including photo-ionization and ejected electron momentum spectra, they are known to break electromagnetic gauge invariance. This paper examines if there is a preferred gauge for the linear field response and photoionization characteristics of nonlocal atomic binding potentials in the length and velocity gauges. It is found that the length gauge is preferable for a wide range of parameters.
arXiv comment9 pages, 7 figures
References in corpus (6)
- Theory of attosecond delays in laser-assisted photoionization
- Strong Field Ionization Rate for Arbitrary Laser Frequencies
- THz generation by optical Cherenkov emission from ionizing two-color laser pulses
- Theoretical study of terahertz generation from atoms and aligned molecules driven by two-color laser fields
- Time-dependent polarization states of high power, ultrashort laser pulses during atmospheric propagation
- Model for the Atomic Dielectric Response in Time Dependent Laser Fields