Southwest Quantum Information and Technology

Illuminating a path forward for silicon donor spin qubits

Presenting Author: Stephanie Simmons, (Simon Fraser)

When it comes to silicon donor-based quantum computation, the most pressing concern is the lack of reliable two-qubit interactions. Silicon donor qubits otherwise match or outperform many qubit rivals, by offering hours-long coherence times in the bulk and >99.9% simultaneous fidelities for single-qubit initialization, manipulation and readout. Moreover, they offer these attributes in a CMOS-compatible platform, which is ripe for future rapid commercialization. In this talk I will introduce an approach to measure and connect donor qubits photonically. This approach should be robust to device environments with variable strains and electric fields, and will allow for CMOS-compatible, bulk-like, spatially separated donor qubit placement, parity measurements, and 4.2K operation. I will present preliminary data in support of this approach, including 4.2K optical readout in Earth's magnetic field, where long T1/T2 times have been measured.

(Session 4 : Thursday from 3:45 pm - 4:30 pm)