NCCR SPIN Research Seminar

Speaker: Arne Laucht (UNSW Sydney)

Title: High temperature operation of electron spin qubits in silicon

Abstract: Silicon is an excellent material for building a commercial quantum computer that allows for the large-scale integration of lithographically defined quantum dot spin qubits. However, the operation of the large number of qubits required for valuable quantum applications will produce a thermal load exceeding the available cooling power of cryostats at millikelvin temperatures. As the scale-up accelerates, it becomes imperative to transition towards fault-tolerant operation above 1 kelvin, where the cooling power of cryostats is orders of magnitude higher. Here, we tune up and operate a two-qubit unit cell in silicon above 1 kelvin, with the combined state preparation, control and measurement fidelity for individual qubits surpassing 95 %. These advancements attest that silicon is a robust platform for quantum computation above 1 kelvin, and further development may readily take place at these temperatures.

Date: Tuesday 4th July

Time: 10:30

Location: In person at the University of Basel (Neue Hörsaal) and online on Zoom.