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6 papers · 2 filters
Role of three-particle vertex within dual fermion calculations
T. Ribic, P. Gunacker, S. Iskakov +5
We investigate the influence of self-energy diagrams beyond the two-particle vertex level within dual fermion theory. Specifically, we calculate the local three-particle vertex and…
Complementary views on electron spectra: From Fluctuation Diagnostics to real space correlations
O. Gunnarsson, J. Merino, T. Schäfer +3
We study the relation between the microscopic properties of a many-body system and the electron spectra, experimentally accessible by photoemission. In a recent paper [Phys. Rev. L…
Kondo Impurities Coupled to Helical Luttinger Liquid: RKKY-Kondo Physics Revisited
Oleg M. Yevtushenko, Vladimir I. Yudson
We show that the paradigmatic Ruderman-Kittel-Kasuya-Yosida (RKKY) description of two local magnetic moments coupled to propagating electrons breaks down in helical Luttinger Liqui…
Diagrammatic routes to nonlocal correlations beyond dynamical mean field theory
G. Rohringer, H. Hafermann, A. Toschi +6
Strong electronic correlations pose one of the biggest challenges to solid state theory. We review recently developed methods that address this problem by starting with the local,…
High harmonic imaging of ultrafast many-body dynamics in strongly correlated systems
R. E. F. Silva, Igor V. Blinov, Alexey N. Rubtsov +2
This Letter brings together two topics that, until now, have been the focus of intense but non-overlapping research efforts. The first concerns high harmonic generation in solids,…
Breakdown of traditional many-body theories for correlated electrons
O. Gunnarsson, G. Rohringer, T. Schäfer +2
Starting from the (Hubbard) model of an atom, we demonstrate that the uniqueness of the mapping from the interacting to the noninteracting Green's function, , is strongly…