Atomic four-wave mixing via condensate collisions

TL;DR

This paper presents a theoretical and simulation-based analysis of atomic four-wave mixing in Bose-Einstein condensate collisions, focusing on atom correlations and number squeezing, aligning with recent experimental findings.

Contribution

It introduces a first-principles quantum simulation approach to model atom correlations and squeezing in condensate collisions, providing a unified understanding of experimental results.

Findings

Atom-atom pair correlations within the scattering halo are characterized.

Expected relative number squeezing of atoms on the sphere is analyzed.

Simulation results align with recent experimental observations.

Abstract

We perform a theoretical analysis of atomic four-wave mixing via a collision of two Bose-Einstein condensates of metastable helium atoms, and compare the results to a recent experiment. We calculate atom-atom pair correlations within the scattering halo produced spontaneously during the collision. We also examine the expected relative number squeezing of atoms on the sphere. The analysis includes first-principles quantum simulations using the positive P-representation method. We develop a unified description of the experimental and simulation results.