Dephasing and revival of an attosecond electron wave packet in silane caused by coupled electron-nuclear dynamics

Soft-X-ray attosecond transient absorption spectroscopy has been performed on silane (SiH4), capturing dephasing and revival of Rydberg-valence electronic wavepackets with periods of 1.32-1.39 fs. The experimental results are confirmed with fully quantum dynamics simulations.