Karl Blum is Professor ath the University of Münster, Germany.

From the reviews of the third edition: "This book under review is of introductory nature being very useful and forming an effective foundation on the powerful density matrix formalism that was originally introduced by von Neumann to describe certain statistical concepts in the then (1927) fashionable quantum mechanics. ... The author's worthy efforts in bringing out the latest edition are quite commendable, as the work would definitely help much in the study and research in the atomic and molecular processes as well as interactions." (Paninjukunnath Achuthan, Zentralblatt MATH, Vol. 1242, 2012)

• Basic Concepts.- General Density Matrix Theory.- Coupled Systems.- Irreducible Components of the Density Matrix.- Radiation from Polarized Atoms: Quantum Beats.- Some Applications.- The Role of Orientation and Alignment in Molecular Processes.- Quantum Theory of Relaxation.

Karl Blum is Professor ath the University of Münster, Germany.

From the reviews of the third edition: "This book under review is of introductory nature being very useful and forming an effective foundation on the powerful density matrix formalism that was originally introduced by von Neumann to describe certain statistical concepts in the then (1927) fashionable quantum mechanics. ... The author's worthy efforts in bringing out the latest edition are quite commendable, as the work would definitely help much in the study and research in the atomic and molecular processes as well as interactions." (Paninjukunnath Achuthan, Zentralblatt MATH, Vol. 1242, 2012)

• Basic Concepts.- General Density Matrix Theory.- Coupled Systems.- Irreducible Components of the Density Matrix.- Radiation from Polarized Atoms: Quantum Beats.- Some Applications.- The Role of Orientation and Alignment in Molecular Processes.- Quantum Theory of Relaxation.

Karl Blum is Professor ath the University of Münster, Germany.

From the reviews of the third edition: "This book under review is of introductory nature being very useful and forming an effective foundation on the powerful density matrix formalism that was originally introduced by von Neumann to describe certain statistical concepts in the then (1927) fashionable quantum mechanics. ... The author's worthy efforts in bringing out the latest edition are quite commendable, as the work would definitely help much in the study and research in the atomic and molecular processes as well as interactions." (Paninjukunnath Achuthan, Zentralblatt MATH, Vol. 1242, 2012)

• Basic Concepts.- General Density Matrix Theory.- Coupled Systems.- Irreducible Components of the Density Matrix.- Radiation from Polarized Atoms: Quantum Beats.- Some Applications.- The Role of Orientation and Alignment in Molecular Processes.- Quantum Theory of Relaxation.