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Vanadyl spin qubit 2D arrays and their integration on superconducting resonators

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Abstract

Vanadyl systems have been shown to possess superior quantum coherence among molecular spin qubits. Meanwhile two-dimensional (2D) networks of spin qubit nodes could provide a means to achieve the control of qubit localization and orientation required for implementation of molecular spin qubits in hybrid solid-state devices. Here, the 2D metal–organic framework [{VO(TCPP)}Zn2(H2O)2] is reported and its vanadyl porphyrin node is shown to exhibit superior spin dynamics and to enable coherent spin manipulations, making it a valid spin qubit candidate. Nanodomains of the MOF 2D coordination planes are efficiently formed at the air–water interface, first under Langmuir–Schaefer conditions, allowing mono- and multiple layer deposits to be transferred to a variety of substrates. Similar nanodomains are then successfully formed in situ on the surface of Nb superconducting coplanar resonators. Transmission measurements with a resonator with a 14 μm-wide constriction allow to estimate that the single spin-photon coupling G1 of the vanadyl spins in the nanodomains is close to being optimal, at ca. 0.5 Hz. Altogether, these results provide the basis for developing a viable hybrid quantum computing architecture.

Graphical abstract: Vanadyl spin qubit 2D arrays and their integration on superconducting resonators

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Article information


Submitted
07 Oct 2019
Accepted
28 Nov 2019
First published
09 Dec 2019

Mater. Horiz., 2020, Advance Article
Article type
Communication

Vanadyl spin qubit 2D arrays and their integration on superconducting resonators

A. Urtizberea, E. Natividad, P. J. Alonso, L. Pérez-Martínez, M. A. Andrés, I. Gascón, I. Gimeno, F. Luis and O. Roubeau, Mater. Horiz., 2020, Advance Article , DOI: 10.1039/C9MH01594A

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