Pulse area dependence of multiple quantum coherence signals in dilute thermal gases

TL;DR

This paper investigates how the pulse area influences quantum coherence signals in dilute thermal gases, revealing periodic behaviors linked to particle interactions and experimental parameters.

Contribution

It provides a detailed analysis of pulse area effects on quantum coherence signals, highlighting their periodic nature and dependence on interactions and polarization.

Findings

1QC and 2QC signals are periodic functions of pulse area.

Signals reflect particle interactions via photon exchange.

Polarizations and observation directions affect coherence signals.

Abstract

In the general framework of open quantum systems, we assess the impact of the pulse area on single and double quantum coherence (1QC and 2QC) signals extracted from fluorescence emitted by dilute thermal gases. We show that 1QC and 2QC signals are periodic functions of the pulse area, with distinctive features which reflect the particles' interactions via photon exchange, the polarizations of the laser pulses, and the observation direction.