Prior to the development of the first lasers in the 1960s, optical coherence was not a subject with which many scientists had much acquaintance, even though early contributions to the field were made
THE first edition of this volume of the Course of Theoretical Physics was published in two parts (1971 and 1974) under the title Relativistic Quantum Theory. It contained not only the basic material o
As n brief characterization of its content, this ninth volume in the Course of Theoretical Physics may be said to deal with the quantum theory of the condensed state of matter. It opens with a detaile
