7-11 October 2019
Facultad de Ciencias Físicas, Universidad Complutense de Madrid
Europe/Madrid timezone

Resumming the fermionic in-medium ladder diagrams to all orders

11 Oct 2019, 09:20
35m
Aula M2 (Facultad de Ciencias Físicas, Universidad Complutense de Madrid)

Aula M2

Facultad de Ciencias Físicas, Universidad Complutense de Madrid

Plaza de Ciencias, 1 Ciudad Universitaria 28040 Madrid, Spain

Speaker

Prof. José Antonio Oller (Universidad de Murcia)

Description

In the past I derived from QFT the generating functional of Green functions in a fermionic medium. Based on this many-body scheme I give an algebraic derivation from first principles of the purely diagrammatical method introduced by N. Kaiser [NPA860,411(2011)] to resum the ladder diagrams for the calculation of the energy per particle in a fermionic environment, including only a constant interacting term in the Hamiltonian. A generalization of this resummation for any given fermion-fermion scattering matrix in vacuum results from the new derivation provided. I also discuss other outcomes of this resummation.

Primary author

Prof. José Antonio Oller (Universidad de Murcia)

Presentation Materials

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