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Q: Fachverband Quantenoptik und Photonik
Q 19: Quantum Information (Quantum Repeater) I
Q 19.6: Talk
Monday, March 11, 2019, 17:30–17:45, S HS 001 Chemie
Atom-to-photon state mapping by quantum teleportation — •Jan Arenskötter1, Stephan Kucera1, Matthias Kreis1, Floriane Brunel2, Pascal Eich1, Philipp Müller1, and Jürgen Eschner1 — 1Universität des Saarlandes, Experimentalphysik, Campus E2.6, 66123 Saarbrücken — 2Université Côte d’Azur, 06108 Nice, France
Atom-to-photon quantum teleportation is an alternative to direct transmission of quantum bits. We demonstrate the teleportation of a qubit encoded in the D5/2 Zeeman sub-levels of a 40Ca+ ion onto the polarization qubit of a single 854 nm photon by heralded absorption [1] of the other photon of an SPDC pair. This method allows us to measure two out of four Bell states. Here we present an extension to full Bell state detection by back-reflection of non-absorbed photons. We verify the method by photon-to-atom quantum state transfer using laser photons.
[1] C. Kurz et al., Nat. Commun. 5, 5527 (2014)