Strong Coupling of a Single Electron in Silicon to a Microwave Photon

TL;DR

This paper demonstrates the strong coupling of a single electron in silicon to a microwave photon, evidenced by vacuum Rabi splitting, advancing silicon-based quantum information processing.

Contribution

It reports the first observation of strong coupling between a silicon quantum dot electron and a microwave cavity photon, enabling long-range qubit interactions.

Findings

Observation of vacuum Rabi splitting in silicon quantum dots

Strong coupling achieved between electron and microwave photon

Potential for long-range entanglement in silicon quantum processors

Abstract

Silicon is vital to the computing industry due to the high quality of its native oxide and well-established doping technologies. Isotopic purification has enabled quantum coherence times on the order of seconds, thereby placing silicon at the forefront of efforts to create a solid state quantum processor. We demonstrate strong coupling of a single electron in a silicon double quantum dot to the photonic field of a microwave cavity, as shown by the observation of vacuum Rabi splitting. Strong coupling of a quantum dot electron to a cavity photon would allow for long-range qubit coupling and the long-range entanglement of electrons in semiconductor quantum dots.