Random Phase Approximation and extensions applied to a bosonic field theory
نویسنده
چکیده
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 φ theory in 1+1 dimensions. We show that 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.
منابع مشابه
/ 02 01 27 9 v 1 3 0 Ja n 20 02 Random Phase Approximation and extensions applied to a bosonic field theory
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 φ theory in 1+1 dimensions. We show that 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 ...
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