Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics V
Q 62.7: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Redoutensaal
Coherent Manipulation of Spin Correlations in the Hubbard Model — •Nicola Wurz1, Chun Fai Chan1, Marcell Gall1, Jan Henning Drewes1, Eugenio Cocchi1,2, Luke Alexander Miller1,2, Daniel Pertot1, Ferdinand Brennecke1, and Michael Köhl1 — 1Physikalisches Institut, University of Bonn, Germany — 2Cavendish Laboratory, University of Cambridge, United Kingdom
We coherently manipulate spin correlations in a two-component atomic Fermi gas loaded into an optical lattice using spatially and time-resolved Ramsey spectroscopy combined with high-resolution in situ imaging. This novel technique allows us not only to imprint spin patterns but also to probe the static magnetic structure factor at arbitrary wave vector, in particular the staggered structure factor. From a measurement along the diagonal of the 1st Brillouin zone of the optical lattice, we determine the magnetic correlation length and the individual spatial spin correlators. At half filling, the staggered magnetic structure factor serves as a sensitive thermometer for the spin temperature, which we employ to study the thermalization of spin and density degrees of freedom during a slow quench of the lattice depth.