Spontaneous decay processes in a classical strong low-frequency laser field

TL;DR

This paper investigates how a strong low-frequency laser field influences spontaneous emission in a two-level atom, revealing multi-photon processes and new decay channels that alter emission dynamics.

Contribution

It introduces a detailed analysis of multi-photon induced decay channels in a strongly driven two-level system, highlighting the interplay between low-frequency driving and emission processes.

Findings

Multi-photon processes open additional decay channels.

Strong low-frequency fields significantly modify spontaneous emission.

Interference effects impact emission dynamics.

Abstract

The spontaneous emission of an excited two-level emitter driven by a strong classical coherent low-frequency electromagnetic field is investigated. We find that for relatively strong laser driving, multi-photon processes are induced, thereby opening additional decay channels for the atom. We analyze the interplay between the strong low-frequency driving and the interfering multiphoton decay channels, and discuss its implications for the spontaneous emission dynamics.