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Portraying entanglement between molecular qubits with four-dimensional inelastic neutron scattering

Author

Listed:
  • E. Garlatti

    (Fisiche ed Informatiche, Università di Parma)

  • T. Guidi

    (ISIS facility, Rutherford Appleton Laboratory)

  • S. Ansbro

    (Institut Laue-Langevin
    School of Chemistry and Photon Science Institute, The University of Manchester)

  • P. Santini

    (Fisiche ed Informatiche, Università di Parma)

  • G. Amoretti

    (Fisiche ed Informatiche, Università di Parma)

  • J. Ollivier

    (Institut Laue-Langevin)

  • H. Mutka

    (Institut Laue-Langevin)

  • G. Timco

    (School of Chemistry and Photon Science Institute, The University of Manchester)

  • I. J. Vitorica-Yrezabal

    (School of Chemistry and Photon Science Institute, The University of Manchester)

  • G. F. S. Whitehead

    (School of Chemistry and Photon Science Institute, The University of Manchester
    Present Address: Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, UK)

  • R. E. P. Winpenny

    (School of Chemistry and Photon Science Institute, The University of Manchester)

  • S. Carretta

    (Fisiche ed Informatiche, Università di Parma)

Abstract

Entanglement is a crucial resource for quantum information processing and its detection and quantification is of paramount importance in many areas of current research. Weakly coupled molecular nanomagnets provide an ideal test bed for investigating entanglement between complex spin systems. However, entanglement in these systems has only been experimentally demonstrated rather indirectly by macroscopic techniques or by fitting trial model Hamiltonians to experimental data. Here we show that four-dimensional inelastic neutron scattering enables us to portray entanglement in weakly coupled molecular qubits and to quantify it. We exploit a prototype (Cr7Ni)2 supramolecular dimer as a benchmark to demonstrate the potential of this approach, which allows one to extract the concurrence in eigenstates of a dimer of molecular qubits without diagonalizing its full Hamiltonian.

Suggested Citation

  • E. Garlatti & T. Guidi & S. Ansbro & P. Santini & G. Amoretti & J. Ollivier & H. Mutka & G. Timco & I. J. Vitorica-Yrezabal & G. F. S. Whitehead & R. E. P. Winpenny & S. Carretta, 2017. "Portraying entanglement between molecular qubits with four-dimensional inelastic neutron scattering," Nature Communications, Nature, vol. 8(1), pages 1-7, April.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms14543
    DOI: 10.1038/ncomms14543
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    Cited by:

    1. E. Garlatti & A. Albino & S. Chicco & V. H. A. Nguyen & F. Santanni & L. Paolasini & C. Mazzoli & R. Caciuffo & F. Totti & P. Santini & R. Sessoli & A. Lunghi & S. Carretta, 2023. "The critical role of ultra-low-energy vibrations in the relaxation dynamics of molecular qubits," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    2. Gheorghe Taran & Eufemio Moreno-Pineda & Michael Schulze & Edgar Bonet & Mario Ruben & Wolfgang Wernsdorfer, 2023. "Direct determination of high-order transverse ligand field parameters via µSQUID-EPR in a Et4N[160GdPc2] SMM," Nature Communications, Nature, vol. 14(1), pages 1-9, December.

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