Affiliation:
1. Karlsruhe Institute of Technology
Abstract
In a series of recent papers starting with , Liu, Yang, Pan claim to have determined the exact dressed electron-boson vertex for a number of very general interacting many-body problems by inverting certain Ward-Takahashi identities. Here, we point out that their Ward-Takahashi identities are missing terms which make the inversion of the identities impossible. One therefore cannot formulate exact self-contained integral equations for the dressed electron propagator. In addition, the proposed vertex expressions do not reproduce well-established results for the leading perturbative corrections.
Published by the American Physical Society
2024
Funder
Deutsche Forschungsgemeinschaft
Publisher
American Physical Society (APS)
Cited by
1 articles.
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