Fractional quantum Hall effect

Two labs agree on a quarter-electron charge in gallium arsenide's ν = 1/2 quantum Hall state

Labs at EPFL and the Weizmann Institute each measured quasiparticles with a quarter of an electron's charge in the ν = 1/2 quantum Hall state. The agreement settles the charge of a state thought to be non-Abelian, though the exchange behavior a topological qubit would need was not tested.