Superconductor-semiconductor hybrid cavity quantum electrodynamics

TL;DR

This paper reviews recent progress in hybrid quantum systems that couple superconducting cavities with semiconductor quantum dots, highlighting advances in strong coupling and potential future research directions.

Contribution

It provides a comprehensive overview of the physics, experimental achievements, and future prospects of superconductor-semiconductor hybrid cavity QED systems.

Findings

Demonstration of strong coupling with single charge

Observation of strong coupling with single spin

Survey of experimental progress in hybrid systems

Abstract

Light-matter interactions at the single particle level have generally been explored in the context of atomic, molecular, and optical physics. Recent advances motivated by quantum information science have made it possible to explore coherent interactions between photons trapped in superconducting cavities and superconducting qubits. Spins in semiconductors can have exceptionally long spin coherence times and can be isolated in silicon, the workhorse material of the semiconductor microelectronic industry. Here, we review recent advances in hybrid "super-semi" quantum systems that coherently couple superconducting cavities to semiconductor quantum dots. We first present an overview of the underlying physics that governs the behavior of superconducting cavities, semiconductor quantum dots, and their modes of interaction. We then survey experimental progress in the field, focusing on recent demonstrations of cavity quantum electrodynamics in the strong coupling regime with a single charge and a single spin. Finally, we broadly discuss promising avenues of future research.