Detecting quadrupole interactions in ultracold Fermi gases
Quantum Gases
2017-10-26 v1 Quantum Physics
Abstract
We propose to detect quadrupole interactions of neutral ultra-cold atoms via their induced mean-field shift. We consider a Mott insulator state of spin-polarized atoms in a two-dimensional optical square lattice. The quadrupole moments of the atoms are aligned by an external magnetic field. As the alignment angle is varied, the mean-field shift shows a characteristic angular dependence, which constitutes the defining signature of the quadrupole interaction. For the states of Yb and Sr atoms, we find a frequency shift of the order of tens of Hertz, which can be realistically detected in experiment with current technology. We compare our results to the mean-field shift of a spin-polarized quasi-2D Fermi gas in continuum.
Cite
@article{arxiv.1402.0873,
title = {Detecting quadrupole interactions in ultracold Fermi gases},
author = {M. Lahrz and Mikhail Lemeshko and Klaus Sengstock and Christoph Becker and L. Mathey},
journal= {arXiv preprint arXiv:1402.0873},
year = {2017}
}