Superconducting atom chips: advantages and challenges

TL;DR

This paper explores the use of superconductors in atom chip devices, discussing their advantages, challenges, and the physics of magnetic trapping in superconducting wires, with implications for atom optics and superconductor research.

Contribution

It provides an analytical and numerical analysis of magnetic traps using superconducting wires, highlighting the effects of vortex dynamics and flux inhomogeneity on atom trapping.

Findings

Superconducting wires can create magnetic traps for atoms with unique properties.

Vortex motion in type II superconductors introduces noise and relaxation challenges.

Superconducting atom chips offer potential advantages for atom optics and quantum technologies.

Abstract

Superconductors are considered in view of applications to atom chip devices. The main features of magnetic traps based on superconducting wires in the Meissner and mixed states are discussed. The former state may mainly be interesting for improved atom optics, while in the latter, cold atoms may provide a probe of superconductor phenomena. The properties of a magnetic side guide based on a single superconducting strip wire placed in an external magnetic field are calculated analytically and numerically. In the mixed state of type II superconductors, inhomogeneous trapped magnetic flux, relaxation processes and noise caused by vortex motion are posing specific challenges for atom trapping.