Abstract
The Green function is introduced in the classical case of a damped-driven harmonic oscillator in order to understand its significance in a simple case. Transition to quantum mechanics allows to review the properties of the single particle Green function in many-body systems. Attention is then focussed on the spectral function and the definition of single particle energies. The connection between the energy sum rule for the ground state and information from quasi-free scattering is finally discussed. In particular, some uncertainties in the data analysis are pointed out, and the relationship between the validity of the energy sum rule and Koopmans theorem is presented.
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© 1976 Springer-Verlag
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Boffi, S. (1976). Green function approach to single particle states in nuclei. In: Boffi, S., Passatore, G. (eds) Nuclear Optical Model Potential. Lecture Notes in Physics, vol 55. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0031203
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DOI: https://doi.org/10.1007/BFb0031203
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