WebJan 5, 2012 · Simple many-body systems 17 Hierarchy problem for dipole systems 18 Two-level approximation for optical transitions 19 Self-consistent extension of the two-level approach 20 Dissipative extension of the two-level approach 21 Quantum-optical extension of the two-level approach 22 Quantum dynamics of two-level system 23 WebSummary This chapter introduces the basic theoretical tools for handling many-body quantum systems. Starting from second quantized operators, we discuss how it is possible to describe the composite wavefunction of multi-particle systems, and discuss representations in various bases.
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