Collinear Four-Wave Mixing of Two-Component Matter Waves

TL;DR

This paper demonstrates collinear four-wave mixing in two-component Bose-Einstein condensates, showing how it can generate new matter wave modes and its potential applications in quantum atom optics and bosonic mixtures.

Contribution

It introduces a novel experimental realization of four-wave mixing in two-component matter waves with good agreement between theory and experiment.

Findings

Successful demonstration of four-wave mixing in two-component BECs

Good agreement between coupled-mode simulations and experimental data

Potential applications in quantum atom optics and optical lattices

Abstract

We demonstrate atomic four-wave mixing of two-component matter waves in a collinear geometry. Starting from a single-species Bose-Einstein condensate, seed and pump modes are prepared through microwave state transfer and state-selective Kapitza-Dirac diffraction. Four-wave mixing then populates the initially empty output modes. Simulations based on a coupled-mode expansion of the Gross-Pitaevskii equation are in very good agreement with the experimental data. We show that four-wave mixing can play an important role in studies of bosonic mixtures in optical lattices. Moreover our system should be of interest in the context of quantum atom optics.