Optimising silicon/silicon-germanium quantum dot qubits

FLEET-AIP seminar. Professor Susan Coppersmith, UNSW
Venue: New Horizons Building, seminar room G30, Monash University
Silicon/silicon-germanium quantum well heterostructures are a leading materials system for hosting semiconducting quantum dot qubits. Compared to the silicon metal-oxide-semiconductor materials stack used in current classical computers, Si/SiGe has the advantage that the qubits are confined near a high-quality epitaxial interface that is relatively far from defects that can degrade performance. This talk will discuss our theoretical work that shows that compositional disorder in the SiGe plays a crucial role and demonstrates how this understanding can be exploited to optimise quantum dot qubits in Si/SiGe .