Many-Body Approach to Electronic Excitations

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Focusing on many-body perturbation theory, this advanced text integrates theoretical spectroscopy applications in condensed matter, including crystals and nanosystems. It thoroughly covers electron-electron and spin interactions, deriving key equations like Dyson and Bethe-Salpeter. The book's structure includes a comprehensive exploration of quantum-field theory, ground state energy via density functional theory, charged excitations, and response functions relevant to various spectroscopies. Selected computational and experimental results are critically discussed, enhancing understanding for graduate students and researchers alike.