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Q: Fachverband Quantenoptik und Photonik

Q 22: Quantengase (Gitter II)

Q 22.5: Talk

Tuesday, March 11, 2008, 17:30–17:45, 1C

A new experiment towards single site addressability in optical lattices — •Christof Weitenberg, Jacob Sherson, Oliver Loesdau, Manuel Endres, Jan Petersen, Immanuel Bloch, and Stefan Kuhr — Institut für Physik,Universität Mainz, Staudingerweg 7, 55128Mainz

We build a new experiment with ⁸⁷Rb atoms in an optical lattice which will allow for atom detection and manipulation with single site resolution. The central part of the new experiment is an ultra-high resolution imaging system with a spatial resolution of 300 nm. Single site manipulation will be achieved by focussing an addressing laser onto individual lattice sites.

Ultracold atoms will be loaded into the lattice from a Bose-Einstein condensate (BEC). It is generated in a crossed optical dipole trap formed by a 50 W YAG laser. The trap can be dynamically compressed by moving the foci of the laser beams. The BEC will be transported by a single beam dipole trap in front of the imaging system and transferred into the optical lattice.

The aim of our project is to prepare and to study single one- and two dimensional quantum systems. Single site addressability will allow us to modify or perturb the system on a local scale and to observe the ensuing dynamics of the many-body system in real time. Quantum gates and entanglement between neighbouring atoms can, for example, be obtained by collisions in a spin-dependent lattice.