Berlin 2014 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 13: Ultracold plasmas and Rydberg systems II (with Q)
A 13.4: Vortrag
Montag, 17. März 2014, 14:45–15:00, DO24 1.101
Exploring the phase diagram of a spatially ordered Rydberg gas — •Johannes Zeiher1, Peter Schauß1, Sebastian Hild1, Takeshi Fukuhara1, Marc Cheneau2, Manuel Endres1, Frauke Seeßelberg1, Tommaso Macri3, Thomas Pohl3, Christian Groß1, and Immanuel Bloch1,4 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany — 2Laboratoire Charles Fabry - Institut d'Optique, Palaiseau, France — 3Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Straße 38, 01187 Dresden, Germany — 4Fakultät für Physik, Ludwig-Maximilians-Universität München, Schellingstraße 4, 80799 München, Germany
Rydberg gases offer the possibility to study long-range correlated many-body states due to their strong van der Waals interactions. In our setup, we optically excite Rydberg atoms and detect them with submicron resolution, which allows us to measure spatial correlations of resulting ordered states. Starting from a two dimensional array of ground state atoms in an optical lattice, we couple to a Rydberg state in a two-photon excitation scheme. Using numerically optimized pulse shapes for coupling strength and detuning, we deterministically prepare the crystalline state in this long-range interacting many-body system. Control of the spatial configuration of the initial state is of great importance for the investigation of the phase diagram. To achieve this, we developed an experimental scheme based on single site addressing allowing for preparation of initial states with sub-Poisson number fluctuations.