Researchers from the University of New South wales (UNSW) discovered that removing random doping in quantum electronic devices dramatically improves their reproducibility. This could be highly useful in creating future quantum spintronics devices.

Doped and undoped wafers for quantum spintronics devices (UNSW)

In their paper, the researchers show that the reproducibility problem in quantum devices comes from the random spatial position of dopants in quantum devices. This is why removing the dopants has such a big effect.