Entanglement in a molecular magnet dimer

Invited

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. We have exploited the capabilities of four-dimensional inelastic neutron scattering (INS) to portray entanglement in weakly coupled molecular qubits and to quantify it [1]. The INS measurements on the prototype (Cr7Ni)2 supramolecular dimer has allowed us to demonstrate the potential of this approach, which allows one to extract the concurrence in eigenstates of a dimer of molecular qubits.

References
1. 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, Nat. Comm. 8, 14543 (2017).

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Presenters

  • Tatiana Guidi

    ISIS, STFC, ISIS facility, Rutherford Appleton Laboratory, Rutherford Appleton Laboratory

Authors

  • Tatiana Guidi

    ISIS, STFC, ISIS facility, Rutherford Appleton Laboratory, Rutherford Appleton Laboratory

  • Elena Garlatti

    Dipartimento di Science Matematiche, Fisiche e Informatiche, Universita' di Parma

  • Stefano Carretta

    Dipartimento di Science Matematiche, Fisiche e Informatiche, Universita' di Parma, Dipartimento di Fisica e Scienze della Terra, Universita di Parma, Parma 43123, Italy

  • Paolo Santini

    Dipartimento di Science Matematiche, Fisiche e Informatiche, Universita' di Parma, Dipartimento di Fisica e Scienze della Terra, Universita di Parma, Parma 43123, Italy

  • Giuseppe Amoretti

    Dipartimento di Science Matematiche, Fisiche e Informatiche, Universita' di Parma

  • Jacques Ollivier

    ILL, Institut Laue-Langevin, Institut Laue Langevin

  • Hannu Mutka

    Institut Laue-Langevin

  • Grigore Timco

    School of Chemistry, The University of Manchester, School of Chemistry, The University of Manchester, Manchester UK, Department of Chemistry, The University of Manchester, Chemistry, University of Manchester

  • Richard Winpenny

    University of Manchester, School of Chemistry, The University of Manchester, School of Chemistry, The University of Manchester, Manchester UK, Department of Chemistry, The University of Manchester, Chemistry, University of Manchester