Quantum information processing with superconducting circuits: a review

TL;DR

Superconducting circuits have rapidly advanced in the past decade, becoming key contenders for scalable quantum information processing with practical applications in physics and chemistry, and achieving significant milestones like quantum simulation and the prospect of quantum supremacy.

Contribution

This review summarizes recent developments in superconducting qubits, circuits, and their applications, emphasizing practical quantum computing and simulation advancements.

Findings

Quantum simulation with up to nine qubits demonstrated.

Quantum Supremacy with fifty qubits anticipated soon.

Emerging integrated classical-quantum systems for software development.

Abstract

During the last ten years, superconducting circuits have passed from being interesting physical devices to becoming contenders for near-future useful and scalable quantum information processing (QIP). Advanced quantum simulation experiments have been shown with up to nine qubits, while a demonstration of Quantum Supremacy with fifty qubits is anticipated in just a few years. Quantum Supremacy means that the quantum system can no longer be simulated by the most powerful classical supercomputers. Integrated classical-quantum computing systems are already emerging that can be used for software development and experimentation, even via web interfaces. Therefore, the time is ripe for describing some of the recent development of superconducting devices, systems and applications. As such, the discussion of superconducting qubits and circuits is limited to devices that are proven useful for current or near future applications. Consequently, the centre of interest is the practical applications of QIP, such as computation and simulation in Physics and Chemistry.