Dispersion of Ultrarelativistic Tardyonic and Tachyonic Wave Packets on Cosmic Scales
Dispersion of Ultrarelativistic Tardyonic and Tachyonic Wave Packets on Cosmic Scales
We investigate the time propagation of tachyonic (superluminal) and tardyonic (subluminal, ordinary) massive wave packets on cosmic scales. A normalizable wave packet cannot be monochromatic in momentum space and thus acquires a positional uncertainty (or packet width) that increases with travel distance. We investigate the question of how this positional …