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Nat Nanotechnol. 2009 Mar;4(3):173-8. doi: 10.1038/nnano.2008.404. Epub 2009 Feb 1.

Engineering the coupling between molecular spin qubits by coordination chemistry.

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  • 1The Lewis Magnetism Laboratory, School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.

Erratum in

  • Nat Nanotechnol. 2009 Mar;4(3). doi: 10.1038/nnano.2008.404.


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.

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