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Bohnet JG, Sawyer BC, Britton JW, et al. Quantum spin dynamics and entanglement generation with hundreds of trapped ions. Science. 2016;352(6291):1297-301doi: 10.1126/science.aad9958.
Bohnet, J. G., Sawyer, B. C., Britton, J. W., Wall, M. L., Rey, A. M., Foss-Feig, M., & Bollinger, J. J. (2016). Quantum spin dynamics and entanglement generation with hundreds of trapped ions. Science (New York, N.Y.), 352(6291), 1297-301. https://doi.org/10.1126/science.aad9958
Bohnet, Justin G, et al. "Quantum spin dynamics and entanglement generation with hundreds of trapped ions." Science (New York, N.Y.) vol. 352,6291 (2016): 1297-301. doi: https://doi.org/10.1126/science.aad9958
Bohnet JG, Sawyer BC, Britton JW, Wall ML, Rey AM, Foss-Feig M, Bollinger JJ. Quantum spin dynamics and entanglement generation with hundreds of trapped ions. Science. 2016 Jun 10;352(6291):1297-301. doi: 10.1126/science.aad9958. PMID: 27284189.
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Science. 2016 Jun 10;352(6291):1297-301. doi: 10.1126/science.aad9958.

Quantum spin dynamics and entanglement generation with hundreds of trapped ions.

Science (New York, N.Y.)

Justin G Bohnet, Brian C Sawyer, Joseph W Britton, Michael L Wall, Ana Maria Rey, Michael Foss-Feig, John J Bollinger

Affiliations

  1. National Institute of Standards and Technology (NIST), Boulder, CO 80305, USA. [email protected] [email protected].
  2. National Institute of Standards and Technology (NIST), Boulder, CO 80305, USA. Georgia Tech Research Institute, Atlanta, GA 30332, USA.
  3. National Institute of Standards and Technology (NIST), Boulder, CO 80305, USA. Army Research Lab, Adelphi, MD 20783, USA.
  4. JILA, NIST, and University of Colorado, Boulder, CO 80309, USA.
  5. JILA, NIST, and Department of Physics, University of Colorado, Boulder, CO 80309, USA.
  6. Army Research Lab, Adelphi, MD 20783, USA. Joint Quantum Institute and NIST, Gaithersburg, MD 20899, USA.

PMID: 27284189 DOI: 10.1126/science.aad9958

Abstract

Quantum simulation of spin models can provide insight into problems that are difficult or impossible to study with classical computers. Trapped ions are an established platform for quantum simulation, but only systems with fewer than 20 ions have demonstrated quantum correlations. We studied quantum spin dynamics arising from an engineered, homogeneous Ising interaction in a two-dimensional array of (9)Be(+) ions in a Penning trap. We verified entanglement in spin-squeezed states of up to 219 ions, directly observing 4.0 ± 0.9 decibels of spectroscopic enhancement, and observed states with non-Gaussian statistics consistent with oversqueezed states. The good agreement with ab initio theory that includes interactions and decoherence lays the groundwork for simulations of the transverse-field Ising model with variable-range interactions, which are generally intractable with classical methods.

Copyright © 2016, American Association for the Advancement of Science.

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