Dresden 2009 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 44: Transport: Quantum Coherence and Quantum Information

TT 44.3: Vortrag

Donnerstag, 26. März 2009, 14:30–14:45, HSZ 304

A quantum interface between light and nuclear spins in quantum dots — Heike Schwager, Juan Ignacio Cirac, and •Geza Giedke — Max-Planck-Institut für Quantenoptik, D-85748 Garching

We show how to exploit the hyperfine interaction of an electron in a quantum dot to realize a quantum interface between the polarized nuclear spins in a 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. Such a coherent coupling of flying photonic qubits to stationary matter-based qubits is an essential building block for quantum communication networks.