--- res: bibo_abstract: - We propose to detect quadrupole interactions of neutral ultracold 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 3P2 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-two-dimensional Fermi gas in continuum. @eng bibo_authorlist: - foaf_Person: foaf_givenName: Martin foaf_name: Lahrz, Martin foaf_surname: Lahrz - foaf_Person: foaf_givenName: Mikhail foaf_name: Lemeshko, Mikhail foaf_surname: Lemeshko foaf_workInfoHomepage: http://www.librecat.org/personId=37CB05FA-F248-11E8-B48F-1D18A9856A87 orcid: 0000-0002-6990-7802 - foaf_Person: foaf_givenName: Klaus foaf_name: Sengstock, Klaus foaf_surname: Sengstock - foaf_Person: foaf_givenName: Christoph foaf_name: Becker, Christoph foaf_surname: Becker - foaf_Person: foaf_givenName: Ludwig foaf_name: Mathey, Ludwig foaf_surname: Mathey bibo_doi: 10.1103/PhysRevA.89.043616 bibo_issue: '4' bibo_volume: 89 dct_date: 2014^xs_gYear dct_language: eng dct_publisher: American Physical Society@ dct_title: Detecting quadrupole interactions in ultracold Fermi gases@ ...