Researchers in Singapore have built a refrigerator that’s just three atoms big. This quantum fridge won’t keep your drinks cold, but it’s cool proof of physics operating at the smallest scales. The device is an “absorption refrigerator.” It works without moving parts, using heat to drive a cooling process. Studying such small devices (quantum thermodynamics) is important to see how thermodynamics — our best understanding of heat flows — may need tweaking to reflect more fundamental laws.
— source quantumlah.org | Jan 29, 2019