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Scientists found a way to cool quantum computers using noise


Two microwave channels act as hot and cold heat reservoirs, highlighted by a reddish and a bluish glow, respectively. The heat reservoirs are coupled to an artificial molecule consisting of two qubits. Controlled microwave noise (white arrows) is injected through the side ports to drive and regulate heat transport. Credit: Simon Sundelin

Quantum computers only work when they are kept extremely cold. The problem is that today's cooling systems also create noise, which can interfere with the fragile quantum information they are supposed to protect. Researchers at Chalmers University of Technology in Sweden have now introduced a new type of minimal quantum "refrigerator" that turns this challenge into an advantage. Instead of fighting noise, the device partially relies on it to operate. The result is highly precise control over heat and energy flow, which could help make large scale quantum technology possible.

Quantum technology is widely expected to reshape ...


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