Volume II of the unrivalled textbook contains the quantum theory of scattering by a potential, addition of angular momenta, time-independent and time-dependent perturbation theory, and systems of identical particles. The new edition also includes a new complement in order to treat an important subject that was missing in the previous editions: the linear response theory, very often used in many fields of physics such as atomic physics and quantum optics, condensed matter physics, and nuclear physics.

The textbook retains its typical style also in the third edition: it explains the fundamental concepts in chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications.

• The quantum mechanics classic: written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë
• As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly
• Comprehensive: in addition to the fundamentals themselves, the book contains more than 170 worked examples plus exercises

Claude Cohen-Tannoudji is a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms.

Bernard Diu (1935-2025) was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics.

Franck Laloë is a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.