Incorporating Carbon Nanotubes into a Superconducting Quantum Bit*

We look at the properties of carbon nanotubes (CNTs) grown on sapphire and quartz. Sapphire and quartz have several attractive features for incorporating CNTs into a quantum bit. Sapphire and quartz are transparent and could be used in a flip-chip design. While sapphire is a plausible alternative to silicone for resonators and qubits, we also measure the properties of quartz. Quartz was found to have a high internal loss. We also look at the effect of radiation on these devices and test their electrical properties and ability to function in the presence of ionizing radiation.