CaltechAUTHORS
Published August 9, 2019 | Version Submitted + Supplemental Material
Journal Article Open

Generation and manipulation of Schrödinger cat states in Rydberg atom arrays

Creators

  • 1. ROR icon Harvard University
  • 2. ROR icon Gordon College
  • 3. ROR icon University of Chicago
  • 4. ROR icon Harvard-Smithsonian Center for Astrophysics
  • 5. ROR icon University of California, Berkeley
  • 6. ROR icon Forschungszentrum Jülich
  • 7. ROR icon University of Ulm
  • 8. ROR icon INFN Sezione di Padova
  • 9. ROR icon University of Cologne
  • 10. ROR icon California Institute of Technology
  • 11. ROR icon Massachusetts Institute of Technology

Abstract

Quantum entanglement involving coherent superpositions of macroscopically distinct states is among the most striking features of quantum theory, but its realization is challenging because such states are extremely fragile. Using a programmable quantum simulator based on neutral atom arrays with interactions mediated by Rydberg states, we demonstrate the creation of "Schrödinger cat" states of the Greenberger-Horne-Zeilinger (GHZ) type with up to 20 qubits. Our approach is based on engineering the energy spectrum and using optimal control of the many-body system. We further demonstrate entanglement manipulation by using GHZ states to distribute entanglement to distant sites in the array, establishing important ingredients for quantum information processing and quantum metrology.

Additional Information

© 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works http://www.sciencemag.org/about/science-licenses-journal-article-reuse. This is an article distributed under the terms of the Science Journals Default License. 13 May 2019; accepted 8 July 2019. We thank D. Sels and C. Reimer for helpful discussions. Funding: The authors acknowledge financial support from the Center for Ultracold Atoms, the National Science Foundation, Vannevar Bush Faculty Fellowship, the U.S. Department of Energy, and the Office of Naval Research. H.L. acknowledges support from the National Defense Science and Engineering Graduate (NDSEG) fellowship. G.S. acknowledges support from a fellowship from the Max Planck/Harvard Research Center for Quantum Optics. J.C., S.M., and T.C. acknowledge funding from the EC H2020 grants 765267 (QuSCo), 817482 (PASQuANS), and QuantERA QTFLAG; the DFG SPP 1929 (GiRyd) and TWITTER; the IQST Alliance; and the Italian PRIN 2017. Author contributions: A.O., H.L., A.K., G.S., T.T.W., S.E., H.B., A.S.Z., and M.E. built the experimental setup. A.O., H.L., A.K., and G.S. performed the measurements and analyzed the data. H.P., S.C., J.C., and S.M. performed theoretical analysis. J.C., M.R., P.R., S.M., and T.C. provided and maintained the optimal control server. All work was supervised by M.G., V.V., and M.D.L. All authors discussed the results and contributed to the manuscript. Competing interests: M.G., V.V., and M.D.L. have an equity interest in and serve on the advisory board of QuEra Computing. Data and materials availability: All data needed to evaluate the conclusions in the paper are present in the paper and the supplementary materials.

Attached Files

Submitted - 1905.05721.pdf

Supplemental Material - aax9743-Omran-SM.pdf

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1905.05721.pdf

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Additional details

Identifiers

Eprint ID
97710
Resolver ID
CaltechAUTHORS:20190808-135256638

Related works

Describes
http://arxiv.org/abs/1905.05721 (URL)

Funding

Harvard-MIT Center for Ultracold Atoms
NSF
Vannever Bush Faculty Fellowship
Department of Energy (DOE)
Office of Naval Research (ONR)
National Defense Science and Engineering Graduate (NDSEG) Fellowship
Max Planck/Harvard Research Center for Quantum Optics
European Research Council (ERC)
765267
European Research Council (ERC)
817482
Deutsche Forschungsgemeinschaft (DFG)
SPP 1929
Integrated Quantum Science and Technology
Istituto Nazionale di Fisica Nucleare (INFN)
PRIN 2017

Dates

Created
2019-08-08
Created from EPrint's datestamp field
Updated
2021-11-16
Created from EPrint's last_modified field

Caltech Custom Metadata

Caltech groups
Institute for Quantum Information and Matter