Transformation of Small-Signal Energy and Momentum of Waves
- 1 November 1964
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 35 (11) , 3268-3272
- https://doi.org/10.1063/1.1713208
Abstract
The transformation of the small-signal energy and momentum of a wave between two inertial reference frames as first given by Sturrock are derived by using simple perturbation theory and the appropriate transformations of length, time, current, and electromagnetic fields. The approach allows a straightforward generalization to the case of relativistic linear transformations and to nonrelativistic transformations between two reference frames that rotate with respect to each other. These rotating and linear transformations allow one to make very general statements about the frequency and wavenumbers for which negative-energy waves are obtained in a rotating and translating medium, as, for example, an electron beam in Brillouin flow.This publication has 5 references indexed in Scilit:
- Amplification of Waves due to Quanta with Negative EnergyJournal of Applied Physics, 1964
- Negative Energy Fast Waves in Brillouin Flow BeamsJournal of Applied Physics, 1963
- Momentum and Energy of WavesJournal of Applied Physics, 1961
- In What Sense Do Slow Waves Carry Negative Energy?Journal of Applied Physics, 1960
- Small Signal Power Theorem for Electron BeamsJournal of Applied Physics, 1957