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cond-mat.str-el2025★ 5 cited
Uncovering relationships between the electronic self-energy and coupled-cluster doubles theory
Christopher J. N. Coveney
We derive the coupled-cluster doubles (CCD) amplitude equations by introduction of the particle-hole-time decoupled electronic self-energy. The resulting analysis leads to an expre…
cond-mat.str-el2025
Non-hermitian Green's function theory with -body interactions: the coupled-cluster similarity transformation
Christopher J. N. Coveney, David P. Tew
We present the diagrammatic theory of the irreducible self-energy and Bethe-Salpeter kernel that naturally arises within the Green's function formalism for a general -body non-h…
cond-mat.str-el2023★ 5 cited
Diagrammatic theory of the irreducible coupled-cluster self-energy
Christopher J. N. Coveney, David P. Tew
Coupled-cluster and Green's function theories are highly successful in treating many-body electron correlation, and there has been significant interest in identifying and leveragin…