# Equivalence of channel-corrected T-matrix and anomalous propagator approach

Source: [Equivalence of channel-corrected T-matrix and anomalous propagator approach](<https://www.sota2.com/research/paper/68fa2aea1e209131ce841ee9>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-28T13:53:11.972Z

Authors: K. Morawetz

Published: 2009-11-09T16:59:23.000Z

## Abstract

Any many-body approximation corrected for unphysical repeated collisions in a given condensation channel is shown to provide the same set of equations as they appear by using anomalous propagators. The ad-hoc assumption in the latter theory about non-conservation of particle numbers can be released. In this way the widespread used anomalous propagator approach is given another physical interpretation. A generalized Soven equation follows which improves any approximation in the same way as the coherent potential approximation (CPA) improves the averaged T-matrix for impurity scattering.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/0911.1725>)

[PDF](<https://arxiv.org/pdf/0911.1725.pdf>)