Can Spinor Dipolar Effects be Observed in Bose-Einstein Condensates?

TL;DR

This paper proposes a practical method to observe weak spinor dipolar effects in Bose-Einstein condensates at accessible magnetic fields, enabling the detection of magnetic dipole-dipole interactions in alkali BECs.

Contribution

The authors introduce a scheme that allows observation of dipolar effects in alkali BECs at magnetic fields around 100 mG, overcoming previous experimental challenges.

Findings

Scheme enables detection of dipolar effects at realistic magnetic fields

Applicable to both alkali and $^{52}$Cr BECs

Facilitates experimental observation of spin textures in BECs

Abstract

Weak dipolar effects in atomic Bose-Einstein condensates (BECs) have recently been predicted to develop spin textures. However, observation of these effects requires magnetic field as low as $\sim 10 \mu$G for spin-1 alkali BECs, so that they are not washed out by the Zeeman effect. We present a scheme to observe the magnetic dipole-dipole interaction in alkali BECs under a realistic magnetic field of $\sim 100$ mG. Our scheme enables us to extract genuine dipolar effects and should apply also to $^{52}$Cr BECs.