Sydney-based Silicon Quantum Computing (SQP) announced that its 11-qubit atom processor has set a new record for multi-qubit, multi-register Quantum Processing Units (QPUs) of the silicon spin qubits modality.
The company claims its QPUs can achieve fidelities of up to 99.99%, along with strengthened qubit quality as the qubit count increases. Specifically, through the advancement of calibration and control protocols, SQP achieved single-qubit and multi-qubit gates with all fidelities ranging from 99.10% to 99.99%. The chip, developed in-house, is patterned with 0.13 nanometer precision by placing phosphorus atoms within pure silicon wafers. The phosphorous atoms then couple by means of the hyperfine interaction to a single, shared electron. The detailed results have been published in Nature.
In its roadmap, SQP envisions commercial scale error-corrected quantum computers by 2033. The company has raised $280m to date, and is one of the 11 companies selected to move on to the second stage of DARPA’s Quantum Benchmarking Initiative.
