A perspective on scaling up quantum computation with molecular spins

TL;DR

This paper discusses how artificial magnetic molecules can advance large-scale quantum computing by integrating quantum resources and reducing costs, emphasizing hybrid coupling with superconducting resonators.

Contribution

It presents a perspective on scaling quantum computation using molecular spins, highlighting hybrid approaches and the challenges involved.

Findings

Molecular spins can serve as microscopic quantum processors.

Coupling molecules to superconducting resonators enables scalable quantum architectures.

Hybrid approaches offer potential advantages but face significant technical challenges.

Abstract

Artificial magnetic molecules can contribute to progressing towards large scale quantum computation by: a) integrating multiple quantum resources and b) reducing the computational costs of some applications. Chemical design, guided by theoretical proposals, allows embedding nontrivial quantum functionalities in each molecular unit, which then acts as a microscopic quantum processor able to encode error protected logical qubits or to implement quantum simulations. Scaling up even further requires 'wiring-up' multiple molecules. We discuss how to achieve this goal by the coupling to on-chip superconducting resonators. The potential advantages of this hybrid approach and the challenges that still lay ahead are critically reviewed.