Dipolar oscillations in a quantum degenerate Fermi-Bose atomic mixture

TL;DR

This paper investigates the coupled dipolar oscillations in a quantum degenerate Fermi-Bose mixture of potassium and rubidium atoms, highlighting how quantum statistical effects influence collective dynamics and interspecies interactions.

Contribution

It provides experimental insights into how Pauli blocking and superfluidity affect collisional interactions in a quantum degenerate Fermi-Bose mixture.

Findings

Interspecies interactions significantly influence dipolar oscillations.

Quantum degeneracy alters collisional dynamics due to Pauli blocking and superfluidity.

Experimental evidence of statistical effects on collective modes.

Abstract

We study the dynamics of coupled dipolar oscillations in a Fermi-Bose mixture of $^{40}$K and $^{87}$Rb atoms. This low-energy collective mode is strongly affected by the interspecies interactions. Measurements are performed in the dynamical and quantum degenerate regimes and evidence the crucial role of the statistical properties of the mixture. At the onset of quantum degeneracy, we investigate the role of Pauli blocking and superfluidity for K and Rb atoms, respectively, resulting in a change in the collisional interactions.