This compact but exhaustive textbook, now in its significantly revised and expanded second edition, provides an essential
introduction to the field quantization of light and matter with applications to atomic physics and strongly correlated systems.
Following an initial review of the origins of special relativity and quantum mechanics, individual chapters are devoted to
the second quantization of the electromagnetic field and the consequences of light field quantization for the description
of electromagnetic transitions. The spin of the electron is then analyzed, with particular attention to its derivation from
the Dirac equation. Subsequent topics include the effects of external electric and magnetic fields on the atomic spectra and
the properties of systems composed of many interacting identical particles. The book also provides a detailed explanation
of the second quantization of the non-relativistic matter field, i.e., the Schroedinger field, which offers a powerful tool
for the investigation of many-body problems, and of atomic quantum optics and entanglement. Finally, two new chapters introduce
the finite-temperature functional integration of bosonic and fermionic fields for the study of macroscopic quantum phenomena:
superfluidity and superconductivity. Several solved problems are included at the end of each chapter, helping readers put
into practice all that they have learned.