TIME-DEPENDENT DENSITY FUNCTIONAL THEORY WITH OPTIMIZED EFFECTIVE POTENTIAL AND SELF-INTERACTION-CORRECTION: APPLICATION TO THE STUDY OF MOLECULAR MULTIPHOTON PROCESSES IN INTENSE PULSED LASER FIELDS Xi Chu and Shih-I Chu* Department of Chemistry, University of Kansas, and Kansas Center for Advanced Scientific Computing, Lawrence, Kansas, 66045 USA We present a new time-dependent density functional theory with optimized effective potential and self-interaction correction for ab initio nonperturbative treatment of multi-electron molecular multiphoton dynamics in intense pulsed laser fields. The theory and the associated computational method will be illustrated by the case study of multiphoton ionization and high-order harmonic generation of H2, N2, etc., in strong fields. * E-mail address: sichu@kuhub.cc.ukans.edu