Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie
Q 57.37: Poster
Donnerstag, 17. März 2011, 16:30–19:30, P1
Quantum Many-Body Systems on the Single-Atom Level — •P. Schauß, C. Weitenberg, M. Endres, J. F. Sherson, M. Cheneau, T. Fukuhara, I. Bloch, and S. Kuhr — Max- Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching
Investigations of ultracold quantum gases in optical lattices have so far been mostly restricted to access global information of the system. Here we present a detection technique that enables us to measure the local distribution of the particles on a single-site and single-atom level1.
Using a high resolution objective we observed fluorescence images of bosonic Mott insulators in the atomic limit. We reconstructed the atom distribution on the lattice from our images and identified individual excitations with high fidelity. A comparison of the radial density and variance distributions with theory provides a precise in situ temperature and entropy measurement from single images.
Furthermore we will present progress towards in-situ thermometry and the direct measurement of correlations across the superfluid-to-Mott-insulator transition.
[1] J. Sherson et al., Nature 467, 68 (2010).