Quantum Dynamics of Complex Systems

The ability to accurately simulate the time evolution of quantum systems stands as a cornerstone of modern molecular science. It provides the essential mechanistic bridge between a system's microscopic structure and its macroscopic function, a challenge first envisioned by Feynman. The central difficulty, and the unifying theme of this Special Topic, is the problem of ``complexity'': amultifaceted challenge arising from the interplay of strongly coupled electronic and vibrational degrees of freedom, quantum statistics, and the