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Free-space read-out and control of single-ion dispersion using quantum interference

G. Hétet, L. Slodička, N. Röck, and R. Blatt
Phys. Rev. A 88, 041804(R) – Published 18 October 2013

Abstract

We perform a free-space measurement and control of the refractive index of a single trapped ion in the presence of quantum interference effects. The single atom refractive index is characterized by the Faraday rotation of a laser field tightly focused onto a trapped and laser-cooled barium ion. It is tuned using the internal ion state that is optically controlled via a V or a Λ scheme. Measurements of the phase shift associated with an electromagnetically induced transparency are then performed and the internal state on the qubit transition is read-out with a detection fidelity of (98±1)%.

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  • Received 4 December 2012

DOI:https://doi.org/10.1103/PhysRevA.88.041804

©2013 American Physical Society

Authors & Affiliations

G. Hétet1, L. Slodička1, N. Röck1,2, and R. Blatt1,2

  • 1Institute for Experimental Physics, University of Innsbruck, A-6020 Innsbruck, Austria
  • 2Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria

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Vol. 88, Iss. 4 — October 2013

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