%0 Journal Article
%A Chiesa, Alessandro
%A Whitehead, George F. S.
%A Carretta, Stefano
%A Carthy, Laura
%A Timco, Grigore A.
%A Teat, Simon J.
%A Amoretti, Giuseppe
%A Pavarini, Eva
%A Winpenny, Richard E. P.
%A Santini, Paolo
%T Molecular nanomagnets with switchable coupling for quantum simulation
%J Scientific reports
%V 4
%@ 2045-2322
%C London
%I Nature Publishing Group
%M FZJ-2015-03740
%P 7423 -
%D 2014
%X Molecular nanomagnets are attractive candidate qubits because of their wide inter- and intra-molecular tunability. Uniform magnetic pulses could be exploited to implement one- and two-qubit gates in presence of a properly engineered pattern of interactions, but the synthesis of suitable and potentially scalable supramolecular complexes has proven a very hard task. Indeed, no quantum algorithms have ever been implemented, not even a proof-of-principle two-qubit gate. Here we show that the magnetic couplings in two supramolecular {Cr7Ni}-Ni-{Cr7Ni} assemblies can be chemically engineered to fit the above requisites for conditional gates with no need of local control. Microscopic parameters are determined by a recently developed many-body ab-initio approach and used to simulate quantum gates. We find that these systems are optimal for proof-of-principle two-qubit experiments and can be exploited as building blocks of scalable architectures for quantum simulation.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000346288300001
%$ pmid:25502419
%R 10.1038/srep07423
%U https://juser.fz-juelich.de/record/201445