Phase control of spatial interference from two duplicated two-level atoms

TL;DR

This paper demonstrates how the phase control of spatial interference in resonance fluorescence from two identical two-level atoms can be achieved using orthogonally polarized fields, with practical methods to enhance interference visibility.

Contribution

It introduces a novel phase control scheme for spatial interference in two-atom systems, including a method to recover interference visibility by adjusting field intensities or using standing waves.

Findings

Interference pattern depends critically on the relative phase.

Adjusting field intensities can recover interference visibility.

Standing-wave fields offer an alternative control method.

Abstract

We report the phase control of spatial interference of resonance fluorescence from two duplicated two-level atoms, driving by two orthogonally polarized fields. In this closed-loop system, the relative phase is of crucial importance to the recovery of the interference patten in the fluorescence light even with strong driving.In order to improve the experimental realizability, we propose a scheme to recover the visibility with fixed relative phase by adjusting the relative intensities between the two driving fields or alternatively by using a standing-wave field.