Probing nearest-neighbor correlations of ultracold fermions in an optical lattice

Details Probing nearest-neighbor correlations of ultracold fermions in an optical lattice Probing nearest-neighbor correlations of ultracold fermions in an optical lattice

2010-12-03

arxiv.org/abs/1012.0845v2

Phys. Rev. Lett. 106, 145302 (2011)

Physics

Condensed Matter

Quantum Gases

4 figures

Scientific paper

10.1103/PhysRevLett.106.145302

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.

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