# Molecular wave-packet dynamics on laser-controlled transition states Source: [Molecular wave-packet dynamics on laser-controlled transition states]() Collection index: [llms.txt]() Data updated: 2025-10-24T19:43:22.549Z Authors: Andreas Fischer, Martin G\\"arttner, Philipp C\\"orlin, Alexander Sperl, Michael Sch\\"onwald, Tomoya Mizuno, Giuseppe Sansone, Arne Senftleben, Joachim Ullrich, Bernold Feuerstein, Thomas Pfeifer, Robert Moshammer Published: 2014-10-29T15:49:09.000Z ## Abstract Understanding and controlling the electronic as well as ro-vibrational motion and, thus, the entire chemical dynamics in molecules is the ultimate goal of ultrafast laser and imaging science. In photochemistry, laser-induced dissociation has become a valuable tool for modification and control of reaction pathways and kinetics. Here, we present a pump-probe study of the dissociation dynamics of H$\_2^+$ using ultrashort extreme-ultraviolet (XUV) and near-infrared (IR) laser pulses. The reaction kinematics can be controlled by varying the pump-probe delay. We demonstrate that the nuclear motion through the transition state can be reduced to isolated pairs of initial vibrational states. The dynamics is well reproduced by intuitive semi-classical trajectories on a time-dependent potential curve. From this most fundamental scenario we gain insight in the underlying mechanisms which can be applied as design principles for molecular quantum control, particularly for ultrafast reactions involving protons. ## Recorded benchmark results A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage. ## Original sources and implementation [Original paper]() [PDF]()