Dressed bound states for attosecond dynamics in strong laser fields

TL;DR

This paper introduces a theoretical framework using dressed bound states to interpret attosecond pump-probe experiments in strong laser fields, enabling a simplified perturbative analysis of laser-atom interactions.

Contribution

It proposes a novel approach based on dressed bound states for analyzing attosecond dynamics in intense laser fields, bridging abstract theory and numerical solutions.

Findings

Dressed bound states effectively capture laser-atom interactions.

The approach simplifies the interpretation of pump-probe measurements.

Comparison shows good agreement with numerical solutions.

Abstract

We propose a theoretical approach for the interpretation of pump-probe measurements where an attosecond pulse is absorbed in the presence of an intense laser pulse. This approach is based on abstractly defined dressed bound states, which capture the essential aspects of the interaction with the laser pulse and facilitate a perturbative description of transitions induced by the attosecond pulse. Necessary properties of dressed bound states are defined and various choices are discussed and compared to accurate numerical solutions of the time-dependent Schroedinger equation.