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Q: Fachverband Quantenoptik und Photonik

Q 28: Quanteninformation: Photonen III

Q 28.1: Talk

Tuesday, March 3, 2009, 16:30–16:45, VMP 6 HS-D

A quantum interface between light and nuclear spins in quantum dots — •Heike Schwager, Geza Giedke, and Ignacio Cirac — Max-Planck Institut für Quantenoptik, Hans-Kopfermann Str. 1, 85748 Garching

The coherent coupling of flying photonic qubits to stationary matter-based qubits is an essential building block for quantum communication networks. We show how such a quantum interface can be realized between the polarized nuclear spins in a singly charged quantum dot strongly coupled to a high-finesse optical cavity and a traveling-wave optical field. By adiabatically eliminating the electronic degree of freedom different effective couplings can be achieved that enable write-in, read-out, and the generation of entanglement between the nuclei and the output field of the cavity.