Proposals for systems embodying condensed matter spin qubits cover a very wide range of length scales, from atomic defects in semiconductors all the way to micron-sized lithographically defined structures. Intermediate scale molecular components exhibit advantages of both limits: like atomic defects, large numbers of identical components can be fabricated; as for lithographically defined structures, each component can be tailored to optimise properties such as quantum coherence. Here we demonstrate what is perhaps the most potent advantage of molecular spin qubits, the scalability of quantum information processing structures using bottom-up chemical self-assembly. Using Cr 7 Ni spin qubit building blocks, we have constructed several families of two-qubit molecular structures with a range of linking strategies. For each family, long coherence times are preserved, and we demonstrate control over the inter-qubit quantum interactions that can be used to mediate two-qubit quantum gates.

Ardavan, A., Bowen, A., Fernandez, A., Fielding, A., Kaminski, D., Moro, F., et al. (2015). Engineering coherent interactions in molecular nanomagnet dimers. NPJ QUANTUM INFORMATION, 1 [10.1038/npjqi.2015.12].

Engineering coherent interactions in molecular nanomagnet dimers

Fernandez, Antonio;Moro, Fabrizio;
2015

Abstract

Proposals for systems embodying condensed matter spin qubits cover a very wide range of length scales, from atomic defects in semiconductors all the way to micron-sized lithographically defined structures. Intermediate scale molecular components exhibit advantages of both limits: like atomic defects, large numbers of identical components can be fabricated; as for lithographically defined structures, each component can be tailored to optimise properties such as quantum coherence. Here we demonstrate what is perhaps the most potent advantage of molecular spin qubits, the scalability of quantum information processing structures using bottom-up chemical self-assembly. Using Cr 7 Ni spin qubit building blocks, we have constructed several families of two-qubit molecular structures with a range of linking strategies. For each family, long coherence times are preserved, and we demonstrate control over the inter-qubit quantum interactions that can be used to mediate two-qubit quantum gates.
Articolo in rivista - Articolo scientifico
Computer Science (miscellaneous); Statistical and Nonlinear Physics; Computer Networks and Communications; Computational Theory and Mathematics
English
2015
1
15012
open
Ardavan, A., Bowen, A., Fernandez, A., Fielding, A., Kaminski, D., Moro, F., et al. (2015). Engineering coherent interactions in molecular nanomagnet dimers. NPJ QUANTUM INFORMATION, 1 [10.1038/npjqi.2015.12].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/210595
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