Laser assisted decay of quasistationary states

TL;DR

This paper presents a theoretical study of how intense laser fields influence the decay of quasistationary states, employing a nonperturbative imaginary time method and validating results against numerical calculations.

Contribution

It introduces a nonperturbative imaginary time approach to analyze quasistationary state decay under strong laser fields, demonstrating good agreement with numerical results.

Findings

Spectra and decay rates are calculated for a test case.

The method shows good quantitative agreement with numerical calculations.

Potential for analyzing strong-field decay processes is confirmed.

Abstract

The effects of intense electromagnetic fields on the decay of quasistationary states are investigated theoretically. We focus on the parameter regime of strong laser fields and nonlinear effects where an essentially nonperturbative description is required. Our approach is based on the imaginary time method previously introduced in the theory of strong-field ionization. Spectra and total decay rates are presented for a test case and the results are compared with exact numerical calculations. The potential of this method is confirmed by good quantitative agreement with the numerical results.