https://www.sciencedaily.com/releases/2020/05/200511112614.htm

IT devices today are based on electronic processes in semiconductors. The next real breakthrough could be to exploit other quantum phenomena, for example interactions between tiny magnetic moments in the material, the so-called spins. So-called quantum-spin liquid materials could be candidates for such new technologies. They differ significantly from conventional magnetic materials because quantum fluctuations dominate the magnetic interactions: Due to geometric constraints in the crystal lattice, spins cannot all "freeze" together in a ground state -- they are forced to fluctuate, even at temperatures close to absolute zero.

Quantum spin liquids: a rare phenomenon