Hannover 2013 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 56: Poster III
Q 56.32: Poster
Donnerstag, 21. März 2013, 16:00–18:30, Empore Lichthof
Experimental Realization of Strong Effective Magnetic Fields with Ultracold Atoms in Optical Superlattices — •Marcos Atala1,2, Monika Aidelsburger1,2, Yu Ao Chen1,2, Sylvain Nascimbène3, Stefan Trotzky1,2, and Immanuel Bloch1,2 — 1Fakultät für Physik, Ludwig-Maximilians-Universität, Schellingstr. 4, 80799 Munich, Germany — 2Max Planck Institute of Quantum Optics, Hans-Kopfermann Str. 1, 85748 Garching, Germany — 3Laboratoire Kastler Brossel, CNRS, UPMC, Ecole Normale Supérieure, 24 rue Lhomond, 75005 Paris, France
Ultracold atoms in optical lattices are promising candidates to study quantum many-body phenomena, such as the integer or fractional quantum Hall effect. Here we report about the experimental realization of strong effective magnetic fields, on the order of one flux quantum per plaquette, with ultracold atoms using photon assisted tunneling in an optical superlattice. When hopping in the lattice, the accumulated phase shift by an atom is equivalent to the Aharonov-Bohm phase of a charged particle exposed to a large staggered magnetic field. We studied the nature of the ground state from ist momentum distribution and observed that the frustration induced by the magnetic field can lead to a degenerate ground state for noninteracting particles. A local measurement performed in a lattice of isolated plaquettes directly revealed the quantum cyclotron orbit of a single atom exposed to the magnetic field.