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Q: Fachverband Quantenoptik und Photonik
Q 2: Quanteninformation: Atome und Ionen I
Q 2.5: Talk
Monday, March 2, 2009, 11:45–12:00, ESA-B
Electromagnetically induced transparency involving Rydberg states in a rubidium microcell — •Harald Kübler1, James Shaffer2, Alex Charnukha1, Thomas Baluktsian1, Christian Urban1, Robert Löw1, and Tilman Pfau1 — 15. Physikalisches Institut, Universität Stuttgart, Germany — 2Homer L. Dodge Department Of Physics And Astronomy, University of Oklahoma, USA
Small glass cells filled with rubidium vapor are promising candidates for quantum information processing using Rydberg states. Due to the strong interaction between two Rydberg atoms, only one Rydberg excitation is possible within a certain volume characterized by the blockade radius (typically few microns), that is determined by the laser bandwidth and the interaction strength. This effect called ''dipole blockade'', provides a nonlinearity that is an essential tool for proposals to entangle atoms using Rydberg states. Similarly, atomic vapor confined on a length scale comparable to the blockade radius can be used like quantum wells (2D), quantum wires (1D) and quantum dots (0D) e.g. to realize a single photon source. We present measurements in rubidium vapor cells with thicknesses on the order of the blockade radius. We observed EIT with Rydberg states and investigated the effects of the confinement in these vapor cells. These experiments show that coherent dynamics involving Rydberg states are possible in micro cells above room temperature.