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

Research output: Contribution to journalArticle

  • External authors:
  • E. Garlatti
  • T Guidi
  • Simon Ansbro
  • P Santini
  • G Amoretti
  • J. Ollivier
  • H. Mutka
  • Grigore Timco
  • Inigo Vitorica-Yrezabal
  • George Whitehead
  • S Carretta


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.

Bibliographical metadata

Original languageEnglish
Article number14543
JournalNature Communications
Early online date20 Feb 2017
StatePublished - 2017