  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.
