%0 Generic %1 flaschner2018precision %A Fläschner, Nick %A Tarnowski, Matthias %A Rem, Benno S. %A Vogel, Dominik %A Sengstock, Klaus %A Weitenberg, Christof %D 2018 %K quantum_gases %T High precision spectroscopy of ultracold atoms in optical lattices %U http://arxiv.org/abs/1801.05614 %X Spectroscopic tools are fundamental for the understanding of complex quantum systems. Here we demonstrate high-precision multi-band spectroscopy in a graphene-like lattice using ultracold fermionic atoms. From the measured band structure, we characterize the underlying lattice potential with a relative error of 1.2 10^(-3). Such a precise characterization of complex lattice potentials is an important step towards precision measurements of quantum many-body systems. Furthermore, we explain the excitation strengths into the different bands with a model and experimentally study their dependency on the symmetry of the perturbation operator. This insight suggests the excitation strengths as a suitable observable for interaction effects on the eigenstates.

@misc{flaschner2018precision, abstract = {Spectroscopic tools are fundamental for the understanding of complex quantum systems. Here we demonstrate high-precision multi-band spectroscopy in a graphene-like lattice using ultracold fermionic atoms. From the measured band structure, we characterize the underlying lattice potential with a relative error of 1.2 10^(-3). Such a precise characterization of complex lattice potentials is an important step towards precision measurements of quantum many-body systems. Furthermore, we explain the excitation strengths into the different bands with a model and experimentally study their dependency on the symmetry of the perturbation operator. This insight suggests the excitation strengths as a suitable observable for interaction effects on the eigenstates.}, added-at = {2018-01-24T14:36:35.000+0100}, author = {Fläschner, Nick and Tarnowski, Matthias and Rem, Benno S. and Vogel, Dominik and Sengstock, Klaus and Weitenberg, Christof}, biburl = {https://www.bibsonomy.org/bibtex/24eb3992e01cffc853a9a96b818d583ae/j.schnars}, description = {[1801.05614] High precision spectroscopy of ultracold atoms in optical lattices}, interhash = {19c36c1e7fbb3451815f5cb259813bb3}, intrahash = {4eb3992e01cffc853a9a96b818d583ae}, keywords = {quantum_gases}, note = {cite arxiv:1801.05614}, timestamp = {2018-01-24T14:36:35.000+0100}, title = {High precision spectroscopy of ultracold atoms in optical lattices}, url = {http://arxiv.org/abs/1801.05614}, year = 2018 }