Superluminal Signal Velocity
Guenter Nimtz
Abstract
It recently has been demonstrated that signals conveyed by evanescent modes can travel faster than light. In this report some special features of signals are introduced and investigated, for instance the fundamental property that signals are frequency band limited. Evanescent modes are characterized by extraordinary properties: Their energy is negative, they are not directly measurable, and the evanescent region is not causal since the modes traverse this region instantaneously. The study demonstrates the necessity of quantum mechanical principles in order to interprete the superluminal signal velocity of classical evanescent modes.
Create a lesson
Related papers
On-Chip Shaping of Surface Acoustic Waves via Continuous Diffractive Modulation
Yuanpeng Ma, Yang Zhao, Shangyang Chen et al.
A Shape-Preserving Shell Theorem
Penelope Messinger, Stephany M. Rodriguez, Trung V. Phan
The dual-array RopeComb: a guide-balanced transmission with synthesisable rising mechanical advantage for impedance-matched launch
Rami N. Mahdi
Automated Sailboat Navigation using Controllabilty-Aware Nonlinear Model Predicitive Control under Stochastic Winds
Junzhuo Wu, Ya-Jun J Pan, Chao Shen et al.
Restoring Invariance to the Mechanical Wave Equation across Inertial Frames
Ashmeet Singh, Heather Romero Michel
Parametric excitation of rotational soft modes of the buckled discrete elastic ring
Panagiotis Koutsogiannakis, Massimo Ruzzene