1/f noise universality in high-technology applications

Quantum mechanics and electrodynamics require the presence of fundamental quantum fluctuations of physical currents, cross sections, and process rates. The present paper calculates these fluctuations, shows that they have a simple universal 1/f spectrum, and shows how they invariably come to the foreground in high-technology applications, because in them all other fluctuations and sources of instability have been either eliminated, or otherwise discounted and put under control.<>