Entanglement of ions in a uniformly-spaced chain using individual addressing and pulse shaping

ORAL

Abstract

We present progress towards entanglement of subsets of $^{171}$Yb$^{+}$ ions in a single uniformly-spaced chain using individual optical addressing and simple laser pulse shaping. A pulsed 355~nm laser drives Raman transitions to create a spin-dependent force on individual ions in the chain, where the collective ion motion facilitates the entanglement of the ions' spin states. By coupling to transverse phonon modes instead of axial modes, we will be less sensitive to thermal motion and ion heating, resulting in comparatively higher gate fidelities. Additionally, faster gate speeds are achievable by applying sequences of a few laser pulses at optimized intensities and detuning that couple to multiple modes of motion~[1,2]. \\[4pt] [1] G.-D. Lin, \textit{et al.} \emph{Europhys. Lett.} \textbf{86}, 60004 (2009)\\[0pt] [2] S-L Zhu, \textit{et al.}, \emph{Europhys. Lett.} \textbf{73}, 485-491 (2006)

*This work is supported by grants from the U.S. Army Research Office with funding from the DARPA OLE program, IARPA, and the MURI program; the NSF PIF Program; the NSF Physics Frontier Center at JQI; and the European Commission AQUTE program.

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Authors

  • S. Debnath

    • JQI and Department of Physics, University of Maryland, College Park, MD 20742
    • JQI and Physics Department, University of Maryland, College Park, MD 20742

  • T.A. Manning

    • JQI and Department of Physics, University of Maryland, College Park, MD 20742
    • JQI and Physics Department, University of Maryland, College Park, MD 20742

  • T. Choi

    • JQI and Department of Physics, University of Maryland, College Park, MD 20742

  • B. Fields

    • JQI and Department of Physics, University of Maryland, College Park, MD 20742
    • JQI and Physics Department, University of Maryland, College Park, MD 20742

  • Chris Monroe

    • JQI and Department of Physics, University of Maryland, College Park, MD 20742
    • Joint Quantum Institute, University of Maryland Department of Physics and National Institute of Standards and Technology, College Park, Maryland 20742
    • University of Maryland and JQI
    • JQI and Physics Department, University of Maryland, College Park, MD 20742