A scalable architecture for quantum computation with molecular nanomagnets. Issue 42 (15th September 2016)

• Record Type: Journal Article
• Authors: Jenkins, M. D.; Zueco, D.; Roubeau, O.; Aromí, G.; Majer, J.; Luis, F.
• Is Part Of: Dalton transactions. Volume 45:Issue 42(2016)
• Page Start: 16682
• Page End: 16693
• Publication Date: 2016-09-15
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c6dt02664h
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : The architecture of a novel concept of a magnetic quantum processor, in which molecular spin qubits are coherently controlled and effectively coupled by single photons trapped in superconducting circuits, is proposed and shown to be feasible. Abstract : A proposal for a magnetic quantum processor that consists of individual molecular spins coupled to superconducting coplanar resonators and transmission lines is carefully examined. We derive a simple magnetic quantum electrodynamics Hamiltonian to describe the underlying physics. It is shown that these hybrid devices can perform arbitrary operations on each spin qubit and induce tunable interactions between any pair of them. The combination of these two operations ensures that the processor can perform universal quantum computations. The feasibility of this proposal is critically discussed using the results of realistic calculations, based on parameters of existing devices and molecular qubits. These results show that the proposal is feasible, provided that molecules with sufficiently long coherence times can be developed and accurately integrated into specific areas of the device. This architecture has an enormous potential for scaling up quantum computation thanks to the microscopic nature of the individual constituents, the molecules, and the possibility of using their internal spin degrees of freedom.