Article abstract
Nature Nanotechnology 4, 173 - 178 (2008)
Published online: 1 February 2009 | Corrected online: 17 February 2009 | doi:10.1038/nnano.2008.404
Subject Categories: Nanomagnetism and spintronics | Quantum information
Engineering the coupling between molecular spin qubits by coordination chemistry
Grigore A. Timco1, Stefano Carretta2, Filippo Troiani3, Floriana Tuna1, Robin J. Pritchard1, Christopher A. Muryn1, Eric J. L. McInnes1, Alberto Ghirri3,4, Andrea Candini3, Paolo Santini2, Giuseppe Amoretti2, Marco Affronte3,4 & Richard E. P. Winpenny1
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.
- The Lewis Magnetism Laboratory, School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, UK
- Dipartimento di Fisica, Università di Parma, v. G.P. Usberti n. 7/A, 43100 Parma, Italy
- CNR-INFM-S3 National Research Centre, via G. Campi 213/A, 41100 Modena, Italy
- Dipartimento di Fisica, Università di Modena e Reggio Emilia, via G. Campi 213/A, 41100 Modena, Italy
Correspondence to: Marco Affronte3,4 e-mail: marco.affronte@unimore.it
Correspondence to: Richard E. P. Winpenny1 e-mail: Richard.Winpenny@manchester.ac.uk
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