Control of Ultracold Atoms with a Chiral Ferromagnetic Film

TL;DR

This paper demonstrates how a chiral ferromagnetic film can be used to control ultracold atoms by creating magnetic mirrors, gratings, and lattices, enabling new quantum simulation platforms.

Contribution

It introduces a novel method of manipulating ultracold atoms using magnetic fields from chiral ferromagnetic films in various phases.

Findings

Magnetic mirror and grating effects demonstrated for ultracold atoms.

Design of 1D and 2D magnetic lattices including honeycomb, Kagome, and triangular.

Analysis of trapping parameters and loss rates for different lattice configurations.

Abstract

We show that the magnetic field produced by a chiral ferromagnetic film can be applied to control ultracold atoms. The film will act as a magnetic mirror or a reflection grating for ultracold atoms when it is in the helical phase or the skyrmion crystal phase respectively. By applying a bias magnetic field and a time-dependent magnetic field, one-dimensional or two-dimensional magnetic lattices including honeycomb, Kagome, triangular types can be created to trap the ultracold atoms. We have also discussed the trapping height, potential barrier, trapping frequency, and Majorana loss rate for each lattice. Our results suggest that the chiral ferromagnetic film can be a platform to develop artificial quantum systems with ultracold atoms based on modern spintronics technologies.