Excited-state electronic coherence in vinyl bromide ions

We have performed time-dependent density functional theory calculations on the molecule vinyl bromide under ionization by a laser and have found long-lived coherent oscillations in the electron density created by a superposition of orbitals. The superposition of the molecular orbitals is quite pronounced for some intensities and is compared to varied alignments and strengths of the exciting laser. The coherence between the orbitals is also shown to be strongly dependent upon atomic motion.