Darmstadt 2008 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 28: Poster Quanteninformation
Q 28.15: Poster
Dienstag, 11. März 2008, 16:30–19:00, Poster C2
Towards long distance atom-atom entanglement — •Wenjamin Rosenfeld1, Florian Henkel1, Michael Krug1, Christian Jakob1, Andreas Deeg1, Fredrik Hocke1, Jürgen Volz1, Markus Weber1, and Harald Weinfurter1,2 — 1Fakultät für Physik der LMU, 80799 München — 2Max-Planck Institut für Quantenoptik, 85748 Garching
Entanglement is a central part of quantum information and communication applications. Of special interest is entanglement between different quantum objects like photons and atoms. It allows to combine the advantages of long atomic coherence times with the ability of photons to transport quantum information over large distances.
In our experiment we generate entanglement between the spin of a single optically trapped Rb87 atom and the polarization of a photon in a spontaneous decay process in a lambda-type transition[1]. Based on this entanglement we performed a first demonstration of a quantum communication protocol between an atomic qubit and a photonic communication channel[2]. More recently we have demonstrated faithful distribution of entanglement over a 300 m long optical fiber. Here we report on the realization of a second atom trap and on the progress towards generating entanglement between two distant atoms via entanglement swapping.
[1] J. Volz et al., PRL 96, 030404 (2006)
[2] W. Rosenfeld et al., PRL 98, 050504 (2007)