A concentrated array of copper porphyrin candidate qubits.

Chung-Jui Yu,Majed S Fataftah,Danna E Freedman,Michael R Wasielewski,Matthew D Krzyaniak

doi:10.1039/c8sc04435j

Abstract

Synthetic chemistry offers a pathway to realize atomically precise arrays of qubits, the smallest unit of a quantum information science system. We harnessed framework chemistry to create an array of qubit candidates, featuring one qubit every 13.6 Å, by synthesizing the new copper(ii) variant of the porphyrinic metal-organic framework PCN-224. We subjected the framework to pulse-electron paramagnetic resonance (EPR) measurements, establishing spin coherence at temperatures up to 80 K within a fully spin concentrated framework. Observation of Rabi oscillations further support the viability of the qubits within these arrays. To interrogate the spin dynamics of qubit arrays, we investigated spin-lattice relaxation, T 1, through a combination of pulse-EPR and alternating current (ac) magnetic susceptibility measurements. These data revealed distinct vibrational environments within the frameworks that contribute to spin dynamics. The aggregate results establish a pathway for a synthetic approach to create spatially precise networks of qubits.

Highlights

The advent of quantum information science (QIS) offers the potential to revolutionize our problem-solving approaches across elds, from cryptography to the simulation of protein folding.[1,2,3,4,5] The development of qubits, the elementary units of a QIS system, is a prerequisite to realize the promise of QIS
We harnessed framework chemistry to create an array of qubit candidates, featuring one qubit every 13.6 A, by synthesizing the new copper(II) variant of the porphyrinic metal–organic framework PCN-224
To interrogate the spin dynamics of qubit arrays, we investigated spin–lattice relaxation, T1, through a combination of pulse-electron paramagnetic resonance (EPR) and alternating current magnetic susceptibility measurements

Summary

Introduction

The advent of quantum information science (QIS) offers the potential to revolutionize our problem-solving approaches across elds, from cryptography to the simulation of protein folding.[1,2,3,4,5] The development of qubits, the elementary units of a QIS system, is a prerequisite to realize the promise of QIS.

Results

Conclusion