Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 42: Poster: Quantum Optics and Photonics II
Q 42.6: Poster
Mittwoch, 13. März 2019, 16:15–18:15, S Atrium Informatik
Detecting via Talbot interferometry finite-range correlations in an interacting ultracold bosonic gas in an optical lattice — •Philipp Höllmer1, Jean-Sébastien Bernier2, and Corinna Kollath2 — 1BCTP, University of Bonn, Nussallee 12, 53115 Bonn, Germany — 2HISKP, University of Bonn, Nussallee 14-16, 53115 Bonn, Germany
We demonstrate here that, even in the presence of interaction, Talbot interferometry can be used to obtain information on the phase correlations in a bosonic gas confined to an optical lattice. Describing this system using the Bose-Hubbard model and using the Lanczos algorithm to obtain both its ground state and simulate its time evolution after a quench of the lattice potential, we identify that consecutive maxima and minima of the Talbot signal are connected to the ground state phase correlators. In particular, we show how the presence of interaction, which impacts finite-distance phase coherence, influences the structure of the Talbot signal.