Researchers at Australia's University of New South Wales (UNSW) say a new method could enable engineers to reliably control millions of quantum bits (qubits), a critical step toward commercially practical full-scale quantum computing.
Qubit control up to now has relied on delivering microwave magnetic fields via heat-producing wires next to the qubits.
The UNSW team has forgone the wires and applied the fields using a dielectric resonator over the quantum chip.
This facilitates simultaneous control over all qubits, which UNSW's Jarryd Pla said could provide control fields of to up to 4 million qubits.
Explained Pla, “The trick is to cleverly design your algorithm so that the correct answer that you’re looking for reveals itself at the end of the calculation, still making use of the parallelism."
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