This intuitive principle appears identically in semiclassical approximations derived from band structure. The Wigner-Kirkwood series is a semiclassical series with eigenvalues given exactly as for WKB approximation. Quantum and semiclassical treatments of system sensitivity to initial conditions are known as quantum chaos. Historically, experiments in quantum physics have often been described in semiclassical terms. These may be broadly divided into quantum mechanical, semiclassical, and classical. Nevertheless, "all" semiclassical theories were refuted definitively in the 1970s and 1980s by photon-correlation experiments. Presently, no semiclassical limit recovering general relativity has been shown to exist. The theoretical construct was created through the use of semiclassical gravity theory. There are cases where semiclassical gravity breaks down. The semiclassical motion of the particle can be described by a closed loop in k-space. What the semiclassical theory does not predict, however, is the squeezing of shot noise. He is best known as the lead vocalist of semiclassical band Kaavish. This is only reproduced in a more sophisticated semiclassical treatment like Sommerfeld's. Semiclassical models of quantum dots frequently incorporate a chemical potential.