title: Engineering the coupling between molecular spin qubits by coordination chemistry.
abstract: The ability to assemble weakly interacting subsystems is a prerequisite for implementing quantum information processing and generating controlled entanglement. In recent years, molecular nanomagnets have been proposed as suitable candidates for qubit encoding and manipulation. In particular, antiferromagnetic Cr7Ni rings behave as effective spin-1/2 systems at low temperature and show long decoherence times. Here, we show that these rings can be chemically linked to each other and that the coupling between their spins can be tuned by choosing the linker. We also present calculations that demonstrate how realistic microwave pulse sequences could be used to generate maximally entangled states in such molecules.
authors.affiliation: The Lewis Magnetism Laboratory, School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
authors.forename: Grigore A
authors.initials: GA
authors.lastname: Timco
authors.forename: Stefano
authors.initials: S
authors.lastname: Carretta
authors.forename: Filippo
authors.initials: F
authors.lastname: Troiani
authors.forename: Floriana
authors.initials: F
authors.lastname: Tuna
authors.forename: Robin J
authors.initials: RJ
authors.lastname: Pritchard
authors.forename: Christopher A
authors.initials: CA
authors.lastname: Muryn
authors.forename: Eric J L
authors.initials: EJ
authors.lastname: McInnes
authors.forename: Alberto
authors.initials: A
authors.lastname: Ghirri
authors.forename: Andrea
authors.initials: A
authors.lastname: Candini
authors.forename: Paolo
authors.initials: P
authors.lastname: Santini
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Amoretti
authors.forename: Marco
authors.initials: M
authors.lastname: Affronte
authors.forename: Richard E P
authors.initials: RE
authors.lastname: Winpenny