论文标题
单向时空定位的波袋中的能量回流
Energy backflow in unidirectional spatiotemporally localized wavepackets
论文作者
论文摘要
回流或恢复传播是一种违反直觉现象，对于向前传播波的能量或概率密度局部向后传播的能量或概率密度。在这项研究中，已经检查了能量回流与相对简单的因果单向有限能源解的相关性，这些溶液是由所谓的基本飞溅模式的分解得出的。在已知的方位角单向波袋以及新型方位角不对称的扩展中给出了特定结果。使用Bateman-Whittaker技术，已经构建了一种新颖的有限能源单向局部局部局部波动，该波浪没有能量回流，并且具有基本跳跃的一些拓扑特性。
Backflow, or retro-propagation, is a counterintuitive phenomenon where for a forward-propagating wave the energy or probability density locally propagates backward. In this study the energy backflow has been examined in connection with relatively simple causal unidirectional finite-energy solutions of the wave equation which are derived from a factorization of the so-called basic splash mode. Specific results are given for the energy backflow arising in known azimuthally symmetric unidirectional wavepackets, as well as in novel azimuthally asymmetric extensions. Using the Bateman-Whittaker technique, a novel finite-energy unidirectional null localized wave has been constructed that is devoid of energy backflow and has some of the topological properties of the basic Hopfion.
