To make an atom-sized machine, you need a quantum mechanic

Here’s a new chapter in the story of the miniaturisation of machines: researchers in a laboratory in Singapore have shown that a single atom can function as either an engine or a fridge. Such a device could be engineered into future computers and fuel cells to control energy flows.

Source:
https://phys.org/news/2020-05-atom-sized-machine-quantum-mechanic.html