Shift of the Bose-Einstein condensation temperature due to dipolar interactions
Abstract
We report the first measurements of the BEC critical temperature shift due to dipolar interactions, employing samples of ultracold erbium atoms which feature significant (magnetic) dipole-dipole interactions in addition to tuneable contact interactions. Using a highly prolate harmonic trapping potential, we observe a clear dependence of the critical temperature on the orientation of the dipoles relative to the trap axis. Our results are in good agreement with mean-field theory for a range of contact interaction strengths. This work opens the door for further investigations into beyond-mean-field effects and the finite-temperature phase diagram in the more strongly dipolar regime where supersolid and droplet states emerge.
Keywords
Cite
@article{arxiv.2501.16318,
title = {Shift of the Bose-Einstein condensation temperature due to dipolar interactions},
author = {Milan Krstajić and Jiří Kučera and Lucas R. Hofer and Gavin Lamb and Péter Juhász and Robert P. Smith},
journal= {arXiv preprint arXiv:2501.16318},
year = {2025}
}
Comments
5 pages, 4 figures, supplementary material (5 pages, 2 figures)