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A quantum heat engine, and the slow road to machines that keep their cool
A working superconducting quantum heat engine points to the unglamorous engineering that has to happen before larger quantum machines can run at scale.

Desk note: Monexus frames this as an engineering story with physics on top. The PHYS.org wire emphasises the heat engine itself; the structural interest is in superconducting architecture and the slow build toward scalable cryogenic hardware.
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