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Q: Fachverband Quantenoptik und Photonik
Q 28: Poster Quanteninformation
Q 28.16: Poster
Tuesday, March 11, 2008, 16:30–19:00, Poster C2
Single-Atom Single-Photon Quantum Interface — •Tatjana Wilk1, Simon C. Webster1, Axel Kuhn2, and Gerhard Rempe1 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching — 2Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK
Atom-cavity systems with the ability to generate single photons provide an ideal toolbox for quantum networks. Atoms stored in an intracavity dipole trap act as quantum memories, whereas photons can be used to interconnect distant atom-cavity nodes. The cavity provides an interface between the stationary and flying qubits that boosts the overall efficiency of single photon generation compared to freespace, thus allowing quantum state transfer from a single atom onto a single photon [1]. This is demonstrated by entangling a single atom with a single photon emitted into the cavity mode and subsequently mapping the quantum state of the atom onto a second photon. The latter step disentangles the atom from the light and results in an entangled photon pair. [1] Wilk et al., Science 317, 488 (2007).