Femtosecond Physics: Laser-Matter Interaction Theory examines various theories relatedto femtosecond physics including an extensive overview of interaction theoryand related concepts. It includes definitions of time-dependent schrödinger equation,field-matter interaction in quantum two-level systems and atoms and molecules. Thisbook provides the reader with insights into the development of its knowledge, so as tounderstand the different theories and applications of femtosecond physics.