Mike Peplow in Nature:
Conventional computers do their ‘thinking’ by shuttling electrons through arrangements of transistors called logic gates. But in order for those thoughts to be stored as computer memories, the electrical signals have to be translated by bulky components into magnetic fields on the metallic grains that cover your hard drive. This additional step takes up extra room in a computer.
What’s more, transistors get so hot that it is becoming increasingly difficult to pack more of them on to silicon chips without melting something important.
The solution? Space-saving, cool-headed, magnetic logic gates.