# Apparatus for quantum-mixture research in microgravity

## TL;DR

This paper demonstrates the high-flux creation and analysis of Bose-Einstein condensate mixtures of potassium-41 and rubidium-87 in a microgravity environment using a sounding rocket, advancing mobile quantum gas research.

## Contribution

It introduces a fully integrated rocket-based setup for generating and studying ultracold quantum mixtures in microgravity, with a novel switch-off protocol and interaction characterization.

## Key findings

- High-flux BEC mixture generation in space
- Characterization of release dynamics under microgravity
- Establishment of a new benchmark for mobile ultracold experiments

## Abstract

Experiments with ultracold quantum gases are a rapidly advancing research field with many applications in fundamental physics and quantum technology. Here, we report on a high-flux generation of Bose-Einstein condensate mixtures of $^{41}$K and $^{87}$Rb, using a fully integrated sounding rocket setup. We investigate the release and the free expansion of the quantum mixtures for different orientations to gravity. The release dynamics are governed by the mixture interactions as well as the decaying magnetic field during the release. The latter can be minimized by a dedicated switch-off protocol of the trap generating currents where an exact model enabled us to characterize the interaction effects. Our results establish a new benchmark for generating ultracold mixtures on mobile platforms, with direct relevance for future experiments on interacting quantum gases and tests of the equivalence principle in space.