Abstract
The quasiparticle renormalization of symmetrized correlation functions is treated in the framework of the double-time Green function theory of many body systems. The work is based on the Mori-theory of response functions transcribed for symmetrized correlation functions. For the specific example of finite Fermi systems it is shown that the physical situation assumed in the quasiparticle-quasihole renormalization of the many-time Green function theory allows to define an equivalent renormalization procedure for correlation functions. This procedure uses projection operator techniques and is therefore of purely algebraic nature.
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Werner, E. A renormalization procedure for the correlation function theory of finite Fermi systems. Z Physik A 284, 105–115 (1978). https://doi.org/10.1007/BF01433882
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DOI: https://doi.org/10.1007/BF01433882