Shot-Noise-Limited Monitoring and Phase Locking of the Motion of a Single Trapped Ion

P. Bushev, G. Hétet, L. Slodička, D. Rotter, M. A. Wilson, F. Schmidt-Kaler, J. Eschner, and R. Blatt
Phys. Rev. Lett. 110, 133602 – Published 26 March 2013

Abstract

We perform a high-resolution real-time readout of the motion of a single trapped and laser-cooled Ba+ ion. By using an interferometric setup, we demonstrate a shot-noise-limited measurement of thermal oscillations with a resolution of 4 times the standard quantum limit. We apply the real-time monitoring for phase control of the ion motion through a feedback loop, suppressing the photon recoil-induced phase diffusion. Because of the spectral narrowing in the phase-locked mode, the coherent ion oscillation is measured with a resolution of about 0.3 times the standard quantum limit.

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  • Received 10 February 2012

DOI:https://doi.org/10.1103/PhysRevLett.110.133602

© 2013 American Physical Society

Authors & Affiliations

P. Bushev1, G. Hétet2,3, L. Slodička2, D. Rotter2, M. A. Wilson2, F. Schmidt-Kaler4, J. Eschner5, and R. Blatt2,3

  • 1Physikalisches Institut, Karlsruher Institut für Technologie, D-76128 Karlsruhe, Germany
  • 2Institute for Experimental Physics, University of Innsbruck, A-6020 Innsbruck, Austria
  • 3Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria
  • 4QUANTUM, Institut für Physik, Universität Mainz, D-55128 Mainz, Germany
  • 5Experimentalphysik, Universität des Saarlandes, D-66123 Saarbrücken, Germany

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Vol. 110, Iss. 13 — 29 March 2013

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