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arXiv · 1310.3295

Bethe-Salpeter Equations from the 4PI effective action

M. E. Carrington·WeiJie Fu·T. Fugleberg·D. Pickering·I. Russell
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Abstract

In this paper we derive a hierarchy of integral equations from the 4PI effective action which have the form of Bethe-Salpeter equations. We show that, together with the equation of motion for the self-consistent 4-vertex, these integral equations are closed, and that their expansions give infinite series of connected diagrams which have the correct symmetry.

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M. E. Carrington, WeiJie Fu, T. Fugleberg, D. Pickering, I. Russell. 2013-10-11. Bethe-Salpeter Equations from the 4PI effective action. https://doi.org/10.1103/physrevd.88.085024

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