Einstein's Theory of Atom–Radiation Interaction -- Atom–Field Interaction: Semiclassical Approach -- States of the Electromagnetic Field I -- States of the Electromagnetic Field II -- Quantum Theory of Coherence -- Phase Space Description -- Atom–Field Interaction -- System–Reservoir Interactions -- Resonance Fluorescence -- Quantum Laser Theory: Master Equation Approach -- Quantum Laser Theory: Langevin Approach -- Quantum Noise Reduction 1 -- Quantum Noise Reduction 2 -- Quantum Phase -- Quantum Trajectories -- Atom Optics -- Measurements, Quantum Limits and All That -- Weak Measurements -- Trapped Ions -- Decoherence -- Quantum Bits, Entanglement and Applications -- Quantum Correlations -- Quantum Cloning and Processing -- Complementarity.

This revised new edition gives a unique and broad coverage of basic laser-related phenomena that allow graduate students, scientists and engineers to carry out research in quantum optics and laser physics. It covers quantization of the electromagnetic field, quantum theory of coherence, atom-field interaction models, resonance fluorescence, quantum theory of damping, laser theory using both the master equation and the Langevin theory, the correlated emission laser, input-output theory with applications to non-linear optics, quantum trajectories, quantum non-demolition measurements and generation of non-classical vibrational states of ions in a Paul trap. This fourth edition provides a new chapter on weak measurement, as well as a new chapter on complementarity. There is also new material included for atom optics and new problems have been added. Each topic is presented in a unified and didactic manner, and is accompanied by specific problems and hints to solutions to deepen the knowledge.