Cryo-CMOS Mixed-Signal Electronics for the Scalable Control of Spin Qubits

Abstract

Quantum computing enables significant speedup compared to classical computing for particular types of calculations. While recent advances have shown quantum processors hosting up to 100’s of superconducting quantum bits (qubits), reliable quantum computation requires quantum processors consisting of millions of qubits that operate with high fidelity. Therefore, the quantum processors that exist today, which operate in an extreme cryogenic environment, need to increase in size. To reduce the wiring and complexity of such large-scale quantum computers, the electronics that is needed for qubit initialization, operation and readout needs to be closely integrated with the quantum processor, requiring integrated circuits operating at deep-cryogenic temperatures. This thesis aims to progress the research in cryogenic integrated circuits for quantum computing applications by analyzing the architecture for a quantum processor based on color centers in diamond, demonstrate DC magnetic field generation and MHz driving for color-center-based quantum processors and develop scalable DC voltage biasing required in semiconductor spin qubit systems.