Andrew Dzurak is one of Australia's leading experts in nanoelectronics and quantum computing technologies. Andrew has played a pivotal role in fostering enduring scientific and strategic collaborations between the United States and Australia.
For decades, the pursuit of quantum computing has struggled with the need for extremely low temperatures, mere fractions of a degree above absolute zero . That's because the quantum phenomena that grant quantum computers their unique computational abilities can only be harnessed by isolating them from the warmth of the familiar classical world we inhabit.
But if quantum computers could function at even slightly higher temperatures, they could be much easier to operate — and much more widely available. In new research published in Nature, our team has shown a certain kind of qubit — the spins of individual electrons — can operate at temperatures around 1K, far hotter than earlier examples.
After that, the control systems need to be built into the same chips as the qubits. However, these integrated electronics use even more power — and dissipate more heat — than the big mess of wires. This is only one degree above absolute zero, so it's still extremely cold. However, it's significantly warmer than previously thought possible. This breakthrough could condense the sprawling refrigeration infrastructure into a more manageable, single system. It would drastically reduce operational costs and power consumption.
A slow burn"Hotter" qubits offer new possibilities, but they will also introduce new challenges in error correction and control. Higher temperatures may well mean an increase in the rate of measurement errors, which will create further difficulties in keeping the computer functional.
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