Incoherent control of electromagnetically induced transparency and Aulter-Townes splitting

TL;DR

This paper investigates how incoherent processes influence electromagnetically induced transparency and Autler-Townes splitting in a three-level quantum system, revealing control mechanisms for light-matter interaction phenomena.

Contribution

It introduces a unified framework analyzing incoherent control over EIT and ATS, highlighting parameter regimes and cross-over mechanisms.

Findings

Distinct parameter regimes for different lineshapes and mechanisms

Incoherent transition controls the EIT-ATS cross-over

Enhanced understanding of light-matter interactions in three-level systems

Abstract

The absorption and dispersion of probe light is studied in an unified framework of three-level system, with coherent laser driving and incoherent pumping and relaxation. The electromagnetically induced transparency (EIT) and Autler-Townes splitting (ATS) are studied in details. In the phase diagram of the unified three-level system, there are distinct parameter regimes corresponding to different lineshapes and mechanisms, and the incoherent transition could control the cross-over between EIT and ATS. The incoherent control of the three-level system enables the investigation of various phenomena in quantum optics, and is beneficial for experiments of light-matter interactions.