论文标题
依赖时间依赖媒体的新机制
A new mechanism for gain in time dependent media
论文作者
论文摘要
时间依赖的系统总体上并不能保留能量无效，使许多为静态系统开发的理论无效，并将我们的直觉转向其头脑。这在腔内时空晶体中尤其急切，其中结构以光速或接近光的速度移动。传统的Bloch波理论不再应用，能量随时间而成倍增长，并且需要一种新的观点才能理解现象学。在这封信中，我们确定了扩增的新机制：尽管如此，数量仍然保守的力线的压缩。
Time dependent systems do not in general conserve energy invalidating much of the theory developed for static systems and turning our intuition on its head. This is particularly acute in luminal space time crystals where the structure moves at or close to the velocity of light. Conventional Bloch wave theory no longer applies, energy grows exponentially with time, and a new perspective is required to understand the phenomenology. In this letter we identify a new mechanism for amplification: the compression of lines of force that are nevertheless conserved in number.
