Quantum Impurity Problems in the Framework of Natural Orbitals
Maxime Debertolis
Gebundenes Buch

Quantum Impurity Problems in the Framework of Natural Orbitals

A Comprehensive Study

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This book presents a complete study of natural orbitals in quantum impurity problems, revealing a certain simplicity in these interacting many-body problems. These systems consist of a few localized degrees of freedom that undergo strong interactions and hybridize with a larger system of free particles; they are central in the study of strongly correlated systems.In a first step, the standard non-perturbative numerical renormalization group method is employed to demonstrate the hierarchical structure of correlations unveiled by natural orbitals. This simplification brought new insights for sim...