Switchable Interaction in Molecular Double Qubits

Ferrando-Soria, J. et al. (2016) Switchable Interaction in Molecular Double Qubits. Chem, 1(5), pp. 727-752. (doi: 10.1016/j.chempr.2016.10.001)

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Quantum information processing (QIP) could revolutionize how we simulate and understand quantum systems. Any QIP scheme requires both individual units (qubits) that have long phase memories and switchable units that can be placed between the qubits. Here, we describe supramolecular systems where {Cr7Ni} rings are used as qubits, linked by redox-switchable {Ru2M} oxo-centered triangles (M = Zn, Ni, or Co). The supramolecular assemblies have been structurally characterized and involve two {Cr7Ni} rings bound to {Ru2M} triangles through iso-nicotinate ligands. Detailed physical studies, including electrochemistry and electron paramagnetic resonance spectroscopy, show that when M = Co, the supramolecular assembly has the physical characteristics needed to implement the √iSWAP gate, which is an important entangling two-qubit gate. Detailed simulations show that the fidelity of this gate is potentially very high and depends on the phase memory time of the {Cr7Ni} qubits but not the {Ru2Co} switch.

Item Type:Articles
Additional Information:This work was supported by the UK Engineering and Physical Sciences Research Council (EPSRC) (studentships to S.A.M. and to G.F.S.W. through the CDT NoWNANO), the European Commission (Marie Curie Intra-European Fellowship to J.F.S. [622659]), and Excellence Unit ‘‘Maria de Maeztu’’ (MDM- 2015-0538). We also thank the EPSRC for funding an X-ray diffractometer (grant number EP/K039547/1). We thank Diamond Light Source for access to synchrotron X-ray facilities. A.C., S.C., and P.S. acknowledge financial support from FIRB project no. RBFR12RPD1 of the Italian Ministry of Education and Research. K.M.L. thanks the National Science Foundation (CHE-1454455). We thank the Stanford Synchrotron Radiation Lightsource for access to synchrotron X-ray facilities (DE-AC02-76SF00515 and P41GM103393).
Glasgow Author(s) Enlighten ID:Sproules, Dr Stephen
Authors: Ferrando-Soria, J., Magee, S. A., Chiesa, A., Carretta, S., Santini, P., Vitorica-Yrezabal, I. J., Tuna, F., Whitehead, G. F.S., Sproules, S., Lancaster, K. M., Barra, A.-L., Timco, G. A., McInnes, E. J.L., and Winpenny, R. E.P.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Chem
Publisher:Elsevier (Cell Press)
ISSN (Online):2451-9294
Published Online:10 November 2016
Copyright Holders:Copyright © 2016 The Authors
First Published:First published in Chem 1(5):727-752
Publisher Policy:Reproduced under a Creative Commons License

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