Integration of the Schroedinger Equation on a Massively Parallel Processor,
Abstract
We use a massively parallel computer to integrate the time-dependent Schrodinger equation for hydrogen in high-intensity radiation fields. Photoelectron and harmonic-radiation spectra are presented. The behavior of atoms in strong radiation fields depends critically upon the time evolution of the field. For example, it has been found that above-threshold ionization (ATI) spectra show radical changes as the duration of the exciting laser pulse decreases; there is also theoretical evidence for novel phenomena, such as population trapping, which occur only for relatively short pulses. In order to treat problems of this sort theoretically, one must employ methods that accommodate general time variation of the radiation field. The most direct such method is numerical integration of the time-dependent Schrodinger equation. This would be an entirely non-controversial approach if vast computational resources were not required to implement it in practice. To data there have been only a few reports of direct integration of the time-dependent Schrodinger equation for a three dimensional, one-electron atom in a radiation field.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 22, 1992
- Accession Number
- ADP007074
Entities
People
- Charles W. Clark
- Jonoathan Parker
- Sayoko Blodgett-ford
Organizations
- National Institute of Standards and Technology