Speaker
Description
Superconducting circuits and spins confined in semiconductor structures represent two leading qubit implementations. Continuous fabrication improvements and a better understanding of semiconductor-oxide interfaces are crucial to enhancing qubit performance.
We use noise spectroscopy in silicon quantum dots to evaluate the substrates and oxides. Furthermore, we present a novel design for superconducting resonators, aiming to improve their internal quality factor by modifying the conductor geometry and minimizing the presence of oxides at the relevant interfaces. We study the reproducibility of the fabrication and explore the properties of different superconducting materials. Addressing these sources of noise and reducing their impact on qubits will be critical for future development of scalable quantum-computing platforms.
