Shell-shaped Bose-Einstein condensates realized with dual-species mixtures

TL;DR

This paper proposes creating shell-shaped Bose-Einstein condensates using dual-species mixtures in microgravity, offering advantages over traditional methods and enabling exploration of many-body effects on curved surfaces.

Contribution

It introduces a novel method for forming quantum bubbles with dual-species mixtures, enhancing robustness and enabling interaction-driven shell expansion.

Findings

Feasibility analysis of dual-species mixtures for shell formation

Comparison with radio-frequency dressing techniques

Potential to observe amplified shell effects

Abstract

Ultracold quantum gases confined in three-dimensional bubble traps are promising tools for exploring many-body effects on curved manifolds. As an alternative to the conventional technique of radio-frequency dressing, we propose to create such shell-shaped Bose-Einstein condensates in microgravity based on dual-species atomic mixtures and we analyze their properties as well as the feasibility to realize symmetrically filled shells. Beyond similarities with the radio-frequency dressing method as in the collective-excitation spectrum, our approach has several natural advantages like the robustness of the created quantum bubbles and the possibility to magnify shell effects through an interaction-driven expansion.