Physical wavelets and their sources: Real physics in complex spacetime
Abstract
For the first time, complete source distributions for the emission and absorption of acoustic and electromagnetic wavelets are defined and computed, both in spacetime and Fourier space. The biggest surprise is the great simplicity of the Fourier sources as compared to the rather convoluted spacetime expressions obtained from the original wavelets. This suggests that the associated pulsed-beam propagators may play a fundamental role in emission and absorption processes including focus or "directivity." It also opens the way to constructing FFT-based algorithms for pulsed-beam analyses of acoustic and electromagnetic waves.
Cite
@article{arxiv.math-ph/0303027,
title = {Physical wavelets and their sources: Real physics in complex spacetime},
author = {Gerald Kaiser},
journal= {arXiv preprint arXiv:math-ph/0303027},
year = {2009}
}
Comments
56 pages, 3 figures. Invited "Topical Review" article for Journal of Physics A: Mathematical and General, http://www.iop.org/journals/jphysa