Physicists realize fractionalization without a magnetic field

https://phys.org/news/2023-10-physicists-fractionalization-magnetic-field.html

"group of electrons acts like carries deficit of charge that is only fraction of electron charge... twisted bilayer graphene (TBG) lattice electron wave function cannot be placed on 1 site, but constrained to be spread over multiple moiré lattice sites... electron wave functions are isotropic clouds centered at lattice sites... wavefunction spread has anisotropic 3-leaf clover shape... some fractional correlated insulator phases only move in certain directions... emergent symmetry unifies their behavior... quantum computing"