  The negatively charged nitrogen-vacancy (NV-) center in diamond has realized
new frontiers in quantum technology. Here, the center's optical and spin
resonances are observed under hydrostatic pressures up to 60 GPa. Our
observations motivate powerful new techniques to measure pressure and image
high pressure magnetic and electric phenomena. Our observations further reveal
a fundamental inadequacy of the current model of the center and provide new
insight into its electronic structure.
