The New World of Gamma-Ray Optics
FOR635
DFG-Projekt Quantum Control and Simulation with Distributed Neutral Atom Systems
Financed by Deutsche Forschungsgemeinschaft DFG since 2006
The process of taming and engineering the quantum world has been highly successful for single quantum objects, or simple pair systems. Outstanding results have recently been obtained with ion traps, including the demonstration of quantum gates and quantum teleportation. However, the great promise of quantum coherent manipulation lies in systems composed of several or even many subsystems. Thus the scalability of the physical systems is now becoming a central issue. The systems of interest have to satisfy two partly conflicting conditions: Firstly, in order to achieve scalability they must be distributed, i.e., composed of many subsystems, which can be manipulated independently, usually by virtue of spatial separation. Secondly, quantum coherence has to be maintained for the whole system. No system is currently available that fully meets both requirements.
In the framework of the Research Unit FOR635 five research groups from Bonn, Braunschweig, Garching and Main pursue this exciting goal in a coordinated effort by studying systems of cold neutral atoms, which are one of the most promising candidates. Experimental work will be carried out with a medium scale 1D lattice of atoms which can be individually controlled, with a large scale 2D and 3D lattice where massive entanglement has already been demonstrated, and with correlated atom-photon states to connect subsystems of the neutral atom ensembles. Theoretical work will focus on the development of measures for large-scale entanglement as well as the realisations of simple quantum simulators closely following the original proposals by Richard P. Feynman. The joint experimental and theoretical efforts in this network offer an ideal basis for testing concepts of large-scale entanglement and gaining insight into the question of how growing complexity affects quantum correlations of the multi-particle system.
Contact:
Professor Dr. Dieter Meschede
Rheinische Friedrich-Wilhelms-Universität Bonn
Institut für Angewandte Physik
Wegelerstraße 8
53115 Bonn
Phone: 0228 73-3478
Fax: 0228 73-3474
E-mail: meschede@uni-bonn.de
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