Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 53: Poster: Quantum Optics and Photonics III
Q 53.10: Poster
Donnerstag, 9. März 2017, 17:00–19:00, P OG2
Spin and Charge Correlation Measurements in the 2D Hubbard Model — Jan Drewes1, Luke Miller1,2, Eugenio Cocchi1,2, Chun Fai Chan1, Nicola Wurz1, •Marcell Gall1, Daniel Pertot1, Ferdinand Brennecke1, and Michael Köhl1 — 1Physikalisches Institut, University of Bonn, Wegelerstrasse 8, 53115 Bonn, Germany — 2Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom
We experimentally study the emergence of correlations in an ultracold, fermionic 2D lattice system, representing a realisation of the Hubbard model. Our ability to precisely tune the system parameters over a large range and the possibility to simultaneously detect the density distribution of both spin components in-situ enables us to examine the emergence of density and spin correlations as a function of doping interaction strength and temperature. In addition we gain from the measurement of the equation of state insight into the full thermodynamics of the 2D Hubbard model. To improve our preparation and detection capabilities, we use a spin spiral technique which allows us to detect the spin structure factor at arbitrary wave vectors. Further we employ a spatial light modulator to reshape the underlying trapping potential of the optical lattice to realize the homogeneous Hubbard model and reach lower temperatures by redistributing entropy between different spatial regions.