Uncertainty Principle and Super-Radiance

Robert Saunders

J. H. Macek

M. G. Benedict, A. M. Ermolaev, Viktor A. Malyshev +2 more

This chapter discusses the two sources: the free-electron laser and the electron-hole plasma in semiconductors. It also discusses the atomic nuclei that may super-radiate in the gamma-ray domain may at least in principle be another non-conventional source of super-radiance. The chapter describes an interesting new experiment of De Voe and Brewer, who have directly observed for the first time the effect of two-atom collective emission, just as predicted by R. H. Dicke in 1954 when the whole subject of super-radiance was launched. It then describes the super-radiance effects in synchrotron radiation. The chapter outlines the quantum approach to the problem of free-electron laser. The gamma-ray device is expected to work on a recoilless Mossbauer transition from an excited level pumped from a pure sample of a long-lived isomer. The chapter explains another system that has a continuous energy spectrum and which is a possible source of super-radiance. It is the electron-hole plasma in semiconductors.

F.J. Duarte

Jianing Han, H. Maeda

We report on super-radiance-cascades and multimode super-radiance in a cold Rydberg gas. Correctly matching the super-radiant radiation and the sample size, or mode-matching, is discussed. In addition, it is shown that the spontaneous emission rate and density determine how fast super-radiance happens and whether or not the multimode super-radiance is observable. The results reported here are essential steps toward super-radiance induced plasma formation and two-photon correlations.

B. Kivel