近日，美国北卡罗来纳大学夏洛特分校的Greg Gbur研究小组取得一项新进展。经过不懈努力，他们从理论上构建了具有任意半径轨道运动的非辐射源。相关研究成果已于2023年5月19日在国际知名学术期刊《物理评论A》上发表。

该研究小组演示了如何在理论上构建具有任意大小和任意半径轨道运动的非辐射源。研究中提供了二维标量波问题的示例。

据悉，长期以来，人们已经知道在几乎所有波动问题中，包括电磁学、声学甚至引力波，扩展源分布的振荡在源的区域之外不会产生辐射。在几乎所有的光学中称为非辐射源或声学中称为非传播激发的演示中，振荡通常是单色的或刚性分布的小位移振动。

附：英文原文

Title: Nonradiating orbital motions

Author: Ray Abney, Greg Gbur

Issue&Volume: 2023/05/19

Abstract: Oscillations of extended source distributions that produce no radiation outside the domain of the source have been long known to be possible in all wave problems, including electromagnetism, acoustics, and even gravitational waves. In almost all demonstrations of these sources, called nonradiating sources in optics and nonpropagating excitations in acoustics, the oscillations are monochromatic or small displacement vibrations of a rigid distribution. Here, we demonstrate how it is possible to theoretically construct nonradiating sources of any size that possess orbital motion of any radius. Examples are given for two-dimensional scalar wave problems.

DOI: 10.1103/PhysRevA.107.053517

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.107.053517