Chapter 1 explains the original spirit in which this book has come into being. It also frames the structure of the book by briefly summarizing the content of each chapter. The book title Excitons and Cooper Pairs may appear quite odd at first because these “particles” exist in materials, that is, semiconductors and superconductors, that exhibit very different properties. Yet, excitons and Cooper pairs are definitely related through the fact that both are composite particles made of two fermions. This book focuses on the composite boson nature of these particles, the many-body effects resulting from this compositeness, the role of the potential felt by the fermionic components, and the peculiar condensation that takes place in composite boson systems.
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