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

We present an approach which is based on the one-particle irreducible (1PI)generating functional formalism and includes electronic correlations on alllength-scales beyond the local correlations of dynamical mean field theory(DMFT). This formalism allows us to unify aspects of the dynamical vertexapproximation (D\GammaA) and the dual fermion (DF) scheme, yielding aconsistent formulation of non-local correlations at the one- and two-particlelevel beyond DMFT within the functional integral formalism. In particular, theconsidered approach includes one-particle reducible contributions from thethree- and more-particle vertices in the dual fermion approach, as well as somediagrams not included in the ladder version of D\GammaA. To demonstrate theapplicability and physical content of the 1PI approach, we compare thediagrammatics of 1PI, DF and D\GammaA, as well as the numerical results ofthese approaches for the half-filled Hubbard model in two dimensions.

One-particle irreducible functional approach - a new route to diagrammatic extensions of DMFT