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- W1995288681 abstract "An application of a self-consistent version of RPA to quantum field theory with broken symmetry is presented. Although our approach can be applied to any bosonic field theory, we specifically study the ϕ4 theory in 1 + 1 dimensions. We show that the standard RPA approach leads to an instability which can be removed when going to a superior version, i.e. the renormalized RPA. We present a method based on the so-called charging formula of the many-electron problem to calculate the correlation energy and the RPA effective potential." @default.
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- W1995288681 date "2002-08-01" @default.
- W1995288681 modified "2023-09-26" @default.
- W1995288681 title "Random phase approximation and extensions applied to a bosonic field theory" @default.
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- W1995288681 doi "https://doi.org/10.1140/epja/i2002-10023-y" @default.
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