How do wave packets spread? Time evolution on Ehrenfest time scales
How do wave packets spread? Time evolution on Ehrenfest time scales
We derive an extension of the standard time-dependent WKB theory, which can be applied to propagate coherent states and other strongly localized states for long times. It in particular allows us to give a uniform description of the transformation from a localized coherent state to a delocalized Lagrangian state, which …