English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Recently Neumayr and Metzner have shown that the connected N-point density-correlation functions of the two-dimensional and the one-dimensional Fermi gasat one-loop order generically vanish/are regular in the small momentum/smallenergy-momentum limits. Their result is based on an explicit analysis in thesequel of results of Feldman et al.[2]. In this note we use Ward identities togive a proof of the same fact - in a considerably shortened and simplified way- for any dimension of space.Comment: 11 pages, 2nd corrected and improved version, to appear in Ann. Henri  Poincar

Singularity Cancellation in Fermion Loops Through Ward Identities