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Engineers Built a Stable Quantum Silicon Chip From Artificial Atoms

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A silicon qubit high-frequency measurement stage.

University of New South Wales researchers have found a way to make artificial atoms on a silicon chip more stable.

Credit: University of New South Wales

Researchers at the University of New South Wales (UNSW) in Australia have found a way to make artificial atoms on a silicon chip more stable by drawing in additional electrons to the atoms' outer shell, which in turn could produce more consistent quantum bits (qubits).

Building on previous work that led to the very first qubits on a silicon chip, the researchers found a way to minimize the error rate caused by imperfections in the silicon.

"Up until now, imperfections in silicon devices at the atomic level have disrupted the way qubits behave, leading to unreliable operation and errors," said UNSW's Ross Leon.

Added UNSW's Andrew Dzurak, "Artificial atoms with a higher number of electrons turn out to be much more robust qubits than previously thought possible, meaning they can be reliably used for calculations in quantum computers."

From ScienceAlert (Australia)
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Abstracts Copyright © 2020 SmithBucklin, Washington, DC, USA


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