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Q: Fachverband Quantenoptik und Photonik

Q 30: Poster II

Q 30.12: Poster

Tuesday, March 3, 2009, 16:30–19:00, VMP 9 Poster

Towards single site addressability in optical lattices — •Manuel Endres, Christof Weitenberg, Jacob Sherson, Jan Petersen, Immanuel Bloch, and Stefan Kuhr — Institut für Physik, Universität Mainz

The investigation of ultracold quantum gases in optical lattices is usually limited to global properties of the system. By contrast we are developing experimental techniques revealing the local distribution of the trapped gas. The main part of the experiment is an optical imaging system with a spatial resolution smaller than the lattice spacing of a near infrared optical lattice.

The preparation of the quantum gas begins with a 2D⁺-MOT as a source of cold atoms. After precooling the atoms in a 3D-MOT, they are transferred to a magnetic quadrupole trap and further cooled with rf-evaporation. Making use of an optical tweezer, the cold atom cloud is transported and loaded into a 3D optical lattice in front of the ultra-high resolution imaging system.

Collecting the fluorescence light of the trapped atoms will enable us to observe the local dynamics of the many-body system. With an additional strongly focused laser beam, single sites of the optical lattice can be addressed. Possible applications of single site addressability are e.g. single qubit rotations or perturbations of the many-body system on a local scale. In general the experimental setup will open new possibilities for the investigation and manipulation of strongly correlated atomic systems for quantum simulation and quantum information processing.