Trapping of ultra cold atoms in a 3He/4He dilution refrigerator

TL;DR

This paper details the development of a specialized dilution refrigerator system that enables ultra cold atom experiments, integrating laser cooling, magnetic trapping, and detection within a cryogenic environment for hybrid quantum systems.

Contribution

It introduces a custom 3He/4He cryostat designed for ultra cold atom experiments with optical access, facilitating hybrid quantum system research.

Findings

Cryostat supports magneto-optical trapping at ultra low temperatures

System enables magnetic trapping and transport of atoms

Achieved conditions suitable for hybrid quantum device integration

Abstract

We describe the preparation of ultra cold atomic clouds in a dilution refrigerator. The closed cycle 3He/4He cryostat was custom made to provide optical access for laser cooling, optical manipulation and detection of atoms. We show that the cryostat meets the requirements for cold atom experiments, specifically in terms of operating a magneto-optical trap, magnetic traps and magnetic transport under ultra high vacuum conditions. The presented system is a step towards the creation of a quantum hybrid system combining ultra cold atoms and solid state quantum devices.