(EurekaAlert) Researchers from the Centre of Excellence for Quantum Computation and Communication Technology (CQC2T) working with Silicon Quantum Computing (SQC) have located the ‘sweet spot’ for positioning qubits in silicon to scale up atom-based quantum processors.
Creating quantum bits, or qubits, by precisely placing phosphorus atoms in silicon – the method pioneered by CQC2T Director Professor Michelle Simmons – is a world-leading approach in the development of a silicon quantum computer.
The researchers say they’ve now uncovered that exactly where you place the qubits is essential to creating strong and consistent interactions. This crucial insight has significant implications for the design of large-scale processors.
UNSW scientists at CQC2T are leading the world in the race to build atom-based quantum computers in silicon. The researchers at CQC2T, and its related commercialisation company SQC, are the only team in the world that have the ability to see the exact position of their qubits in the solid state.
“Being able to observe and precisely place atoms in our silicon chips continues to provide a competitive advantage for fabricating quantum computers in silicon,” says Prof. Simmons.
The teams are working with SQC to build the first useful, commercial quantum computer in silicon. Co-located with CQC2T on the UNSW Sydney campus, SQC’s goal is to build the highest quality, most stable quantum processor.

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