Phase-dependent quantum interferences with three-level artificial atoms

TL;DR

This paper investigates how the phase of a driving laser influences quantum interference effects in a three-level quantum well system, enabling control over cavity field suppression through phase tuning.

Contribution

It demonstrates phase-dependent quantum interference in a three-level artificial atom system, showing how laser phase control can suppress cavity fields despite ongoing pumping.

Findings

Phase difference tuning leads to destructive quantum interference.

Cavity field can vanish while the emitter remains pumped.

Phase control enables manipulation of quantum dynamics.

Abstract

The phase dependence of the cavity quantum dynamics in a driven equidistant three-level ladder-type system found in a quantum well structure with perpendicular transition dipoles is investigated in the good cavity limit. The pumping laser phases are directly transferred to the superposed amplitudes of the cavity-quantum-well interaction. Their phase difference may be tuned in order to obtain destructive quantum interferences. Therefore, the cavity field vanishes although the emitter continues to be pumped.