title: Direct photonic coupling of a semiconductor quantum dot and a trapped ion.
abstract: Coupling individual quantum systems lies at the heart of building scalable quantum networks. Here, we report the first direct photonic coupling between a semiconductor quantum dot and a trapped ion and we demonstrate that single photons generated by a quantum dot controllably change the internal state of a Yb^{+} ion. We ameliorate the effect of the 60-fold mismatch of the radiative linewidths with coherent photon generation and a high-finesse fiber-based optical cavity enhancing the coupling between the single photon and the ion. The transfer of information presented here via the classical correlations between the σ_{z} projection of the quantum-dot spin and the internal state of the ion provides a promising step towards quantum-state transfer in a hybrid photonic network.
authors: Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.|Physikalisches Institut, University of Bonn, Wegelerstrasse 8, 53115 Bonn, Germany.
authors: H M
authors: HM
authors: Meyer
authors: Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
authors: R
authors: R
authors: Stockill
authors: Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
authors: M
authors: M
authors: Steiner
authors: Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
authors: C
authors: C
authors: Le Gall
authors: Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
authors: C
authors: C
authors: Matthiesen
authors: EPSRC National Centre for III-V Technologies, University of Sheffield, Sheffield S1 3JD, United Kingdom.
authors: E
authors: E
authors: Clarke
authors: Lehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität, 44780 Bochum, Germany.
authors: A
authors: A
authors: Ludwig
authors: Laboratoire Kastler Brossel, École Normale Supérieure, 24 Rue Lhomond, 75005 Paris, France.
authors: J
authors: J
authors: Reichel
authors: Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
authors: M
authors: M
authors: Atatüre
authors: Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.|Physikalisches Institut, University of Bonn, Wegelerstrasse 8, 53115 Bonn, Germany.
authors: M
authors: M
authors: Köhl