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Q: Fachverband Quantenoptik und Photonik

Q 31: Quantum Gases: Opt. Lattice 2

Q 31.1: Vortrag

Mittwoch, 16. März 2011, 14:30–14:45, HSZ 02

Probing nearest-neighbor correlations of ultracold fermions in an optical lattice — •Thomas Uehlinger, Daniel Greif, Leticia Tarruell, Robert Jördens, Gregor Jotzu, and Tilman Esslinger — Institute for Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland

We demonstrate a probe for nearest-neighbor correlations of fermionic quantum gases in optical lattices. It gives access to spin and density configurations of adjacent sites and relies on creating additional doubly occupied sites by perturbative lattice modulation. The measured correlations for different lattice temperatures are in good agreement with an ab initio calculation without any fitting parameters. This probe opens new prospects for studying the approach to magnetically ordered phases.