The team put graphite under an intense amount of pressure, before heating it to 1,800 K. The newly produced diamond has a hardness of 155 gigapascals (GPa). Natural diamond, by comparison, tops out at around 110 GPa in hardness.
Researchers have developed a new approach to preserving superposition in a class of quantum devices built from synthetic diamonds. The work could ultimately prove an important step toward reliable quantum computers.
