Since their theoretical discovery in 2012, time crystals have been front-and-center in conversations about how to improve quantum computers. While diamond, ice, and any other solid you can think of has a crystal lattice structure that repeats in space (another name for them could be “space crystals”), time crystals, as their name suggests, oscillate in perpetual cycles across time. These crystals, the thinking goes, could form stable forms of quantum memory and error-free quantum circuits, drastically improving a quantum computer’s performance.