Coherent and conventional quantum 1/f effect
Peter Händel · physica status solidi (b) · 1996
Abstract The quantum 1/f theory is the application of a new type of infrared radiative corrections to the calculation of the rate or cross section of elementary physical processes. These new quantum‐electrodynamical corrections, first introduced in 1975, are time‐dependent and represent fluctuations also known as quantum 1/f noise. They define the new notions of physical cross sections and process rates which contain both the fundamental macroscopic low‐frequency quantum 1/f fluctuations and the well‐known, related, classical, and quantum‐mechanical concepts which are constant in time. A simple universal formula allows the calculation of this quantum 1/f effect for any elementary process, such as scattering, recombination, or tunneling in semiconductors, in other condensed matter, or in free space. This yields quantum 1/f fluctuations in the frequency of collisions, in the mobility of the carriers, their diffusion constant and surface or bulk recombination rate. The quantum 1/f effect presented in this paper thus has a fundamental nature and a practical importance because it limits the performance of semiconductor devices and of most other high‐technology applications.