Nanoassembly technique of carbon nanotubes for hybrid circuit-QED

TL;DR

This paper presents a novel transfer technique for integrating clean carbon nanotubes into complex quantum dot circuits within a circuit QED platform, enabling advanced hybrid quantum device development.

Contribution

The authors introduce a versatile transfer process for carbon nanotubes compatible with various contact materials, demonstrated across eight devices for robust hybrid quantum circuit fabrication.

Findings

Successful integration of clean nanotubes into quantum circuits

Compatibility with superconducting and ferromagnetic contacts

Robustness demonstrated across multiple devices

Abstract

A complex quantum dot circuit based on a clean and suspended carbon nanotube embedded in a circuit quantum electrodynamique (cQED) architecture is a very attractive platform to investigate a large spectrum of physics phenomena ranging from qubit physics to nanomechanics. We demonstrate a carbon nanotube transfer process allowing us to integrate clean carbon nanotubes into complex quantum dot circuits inside a cQED platform. This technique is compatible with various contacting materials such as superconductors or ferromagnets. This makes it suitable for hybrid quantum devices. Our results are based on 8 different devices demonstrating the robustness of this technique.