The second volume of this book series presents a foundation for describing electron-field interactions, the basic elements involved in open quantum theory, the dissipative couplings of the active elements, the quantum injection dot electrons and coherent electromagnetic fields produced by crystal lattice vibrations. A microscopic description of the systems of interest is used to explain a number of structural models that describe electron arrangement and mechanics in such systems. The explanation of these models depends on a number of numerical parameters and calculations which have been explicitly discussed in detail. Readers will gain a better understanding of open quantum systems and energy conversion in semiconductor devices. Theoretical calculations presented in this book can also be compared with experimental data from prior experiments. The volume is also supplemented by an adequate bibliography which provides useful references. This book is a handy text on advanced quantum theory for advanced physics and electronics students and researchers.