  Time-dependent orbital-free density functional theory (TD-OFDFT) is an
efficient ab-initio method for calculating the electronic dynamics of large
systems. In comparison to standard TD-DFT, it computes only a single electronic
state regardless of system size, but it requires an additional time-dependent
Pauli potential term. We propose a nonadiabatic and nonlocal Pauli potential
whose main ingredients are the time-dependent particle and current densities.
Our calculations of the optical spectra of metallic and semiconductor clusters
indicate that nonlocal and nonadiabatic TD-OFDFT performs accurately for
metallic systems and semiquantitatively for semiconductors. This work opens the
door to wide applicability of TD-OFDFT for nonequilibrium electron and
electron-nuclear dynamics of materials.
