Atom and photon measurement in cooperative scattering by cold atoms

TL;DR

This paper investigates how low intensity light interacts with cold atom clouds, focusing on cooperative scattering effects, radiation pressure forces, and the influence of collective phenomena like the Lamb shift.

Contribution

It provides new analytical expressions for cooperative scattering forces including the collective Lamb shift and compares forces on product and entangled states at low intensities.

Findings

Derived expressions for cooperative scattering forces including collective Lamb shift.

Showed radiation pressure force is identical for product and entangled states at low intensities.

Analyzed the impact of dipole coupling in dilute cold atom clouds.

Abstract

In this paper, we study cooperative scattering of low intensity light by a cloud of N two-level systems. We include the incident laser field driving these two-level systems and compute the radiation pressure force on the center of mass of the cloud. This signature is of particular interest for experiments with laser cooled atoms. Including the complex coupling between dipoles in a scalar model for dilute clouds of two-level systems, we obtain expression for cooperative scattering forces taking into account the collective Lamb shift. We also derive the expression of the radiation pressure force on a large cloud of two-level systems from an heuristic approach and show that at lowest driving intensities this force is identical for a product and an entangled state.