RPA equations and the instantaneous Bethe-Salpeter equation

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We give a derivation of the particle-hole RPA equations for an interacting multi-fermion system by applying the instantaneous approximation to the amputated two-fermion propagator of the system. In relativistic field theory the same approximation leads from the fermion-antifermion Bethe-Salpeter equation to the Salpeter equation. We show that RPA equations and Salpeter equation are indeed equivalent.
6 pages, RevTeX, Bonn TK-93-19

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Nuclear Theory, High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/149488

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/nucl-th/9312013
 http://arxiv.org/abs/nucl-th/9312013

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arXiv