Hannover 2013 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 40: Poster: Ultra-cold plasmas and Rydberg systems (with Q)

A 40.5: Poster

Donnerstag, 21. März 2013, 16:00–18:30, Empore Lichthof

Creation of GHZ-states in optical lattices of alkaline-earth atoms — •Rick Mukherjee, Arnab Das, Frank Pollmann, and Thomas Pohl — Max Planck Institute for the Physics of Complex Systems, Dresden, Germany

We present a scheme for the production of many-body GHZ states in an optical lattice of Strontium atoms via optical excitation to strongly interacting atomic states. We identify magic wavelengths that permit strong lattice confinement for both internal states, and yield an effective Ising spin model with controllable external fields. For the considered case, the interactions are attractive such that this system features a quantum phase transition between para- and ferromagnetic phases. We identify suitable field ramps across the transition that permit the controlled creation of GHZ-states for large system sizes and with high fidelity.