Bose-Einstein condensates on a permanent magnetic film atom chip

TL;DR

This paper demonstrates the use of a permanent magnetic film atom chip to produce and manipulate Bose-Einstein condensates of rubidium atoms, enabling studies of disordered potentials and condensate splitting.

Contribution

It introduces a novel magnetic film atom chip capable of generating BECs and controlling their spatial configuration, including disordered potentials and double well systems.

Findings

Successfully produced a BEC of 10^5 87Rb atoms.

Observed fragmentation near the film surface.

Realized a time-dependent double well system.

Abstract

We present a permanent magnetic film atom chip based on perpendicularly magnetized TbGdFeCo films. This chip routinely produces a Bose-Einstein condensate (BEC) of 10^5 87Rb atoms using the magnetic film potential. Fragmentation observed near the film surface provides unique opportunities to study BEC in a disordered potential. We show this potential can be used to simultaneously produce multiple spatially separated condensates. We exploit part of this potential to realize a time-dependent double well system for splitting a condensate.