Free-energy functional of instantaneous correlation field in liquids: Field-theoretic derivation of the closures.

@article{Frusawa2020FreeenergyFO,
  title={Free-energy functional of instantaneous correlation field in liquids: Field-theoretic derivation of the closures.},
  author={H. Frusawa},
  journal={Physical review. E},
  year={2020},
  volume={102 1-1},
  pages={
          012117
        }
}
  • H. Frusawa
  • Published 2020
  • Mathematics, Physics, Medicine
  • Physical review. E
This paper presents a unified method for formulating a field-theoretic perturbation theory that encompasses the conventional liquid state theory. First, the free-energy functional of an instantaneous correlation field is obtained from the functional-integral representation of the grand potential. Next, we demonstrate that the instantaneous free-energy functional yields a closure relation between the correlation functions in the mean-field approximation. Notably, the obtained closure relation… Expand

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