Preparation of Entangled States through Hilbert Space Engineering

Y. Lin, J. P. Gaebler, F. Reiter, T. R. Tan, R. Bowler, Y. Wan, A. Keith, E. Knill, S. Glancy, K. Coakley, A. S. Sørensen, D. Leibfried, and D. J. Wineland
Phys. Rev. Lett. 117, 140502 – Published 28 September 2016
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Abstract

We apply laser fields to trapped atomic ions to constrain the quantum dynamics from a simultaneously applied global microwave field to an initial product state and a target entangled state. This approach comes under what has become known in the literature as “quantum Zeno dynamics” and we use it to prepare entangled states of two and three ions. With two trapped Be9+ ions, we obtain Bell state fidelities up to 0.9905+2; with three ions, a W-state fidelity of 0.9107+4 is obtained. Compared to other methods of producing entanglement in trapped ions, this procedure can be relatively insensitive to certain imperfections such as fluctuations in laser intensity.

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  • Received 15 June 2016

DOI:https://doi.org/10.1103/PhysRevLett.117.140502

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyAtomic, Molecular & Optical

Authors & Affiliations

Y. Lin1,*, J. P. Gaebler1, F. Reiter2,†, T. R. Tan1, R. Bowler1,‡, Y. Wan1, A. Keith1, E. Knill1, S. Glancy1, K. Coakley1, A. S. Sørensen2, D. Leibfried1, and D. J. Wineland1

  • 1National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
  • 2The Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100 Copenhagen Ø, Denmark

  • *To whom correspondence should be addressed. yiheng.lin@colorado.edu Present address: JILA, National Institute of Standards and Technology and University of Colorado, and Department of Physics, University of Colorado, Boulder, CO 80309, USA.
  • Present address: Harvard University, Department of Physics, 17 Oxford Street, Cambridge, MA 02138, USA.
  • Present address: University of Washington, Department of Physics, Box 351560, Seattle, Washington 98195, USA.

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Issue

Vol. 117, Iss. 14 — 30 September 2016

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