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Extended crossover from a Fermi liquid to a quasiantiferromagnet in the half-filled 2D Hubbard model
The ground state of the Hubbard model with nearest-neighbor hop** on the square lattice
at half filling is known to be that of an antiferromagnetic (AFM) band insulator for any on-site …
at half filling is known to be that of an antiferromagnetic (AFM) band insulator for any on-site …
Fingerprints of the local moment formation and its Kondo screening in the generalized susceptibilities of many-electron problems
We identify the precise hallmarks of the local magnetic moment formation and its Kondo
screening in the frequency structure of the generalized charge susceptibility. The sharpness …
screening in the frequency structure of the generalized charge susceptibility. The sharpness …
Single-boson exchange decomposition of the vertex function
We present a decomposition of the two-particle vertex function of the single-band Anderson
impurity model which imparts a physical interpretation of the vertex in terms of the exchange …
impurity model which imparts a physical interpretation of the vertex in terms of the exchange …
Boson-exchange parquet solver for dual fermions
We present and implement a parquet approximation within the dual-fermion formalism
based on a partial bosonization of the dual vertex function which substantially reduces the …
based on a partial bosonization of the dual vertex function which substantially reduces the …
Explaining the pseudogap through dam** and antidam** on the Fermi surface by imaginary spin scattering
The mechanism of the pseudogap observed in hole-doped cuprates remains one of the
central puzzles in condensed matter physics. We analyze this phenomenon via a Feynman …
central puzzles in condensed matter physics. We analyze this phenomenon via a Feynman …
Self-consistent ladder dynamical vertex approximation
We present and implement a self-consistent D Γ A approach for multiorbital models and ab
initio materials calculations. It is applied to the one-band Hubbard model at various …
initio materials calculations. It is applied to the one-band Hubbard model at various …
Charge transport in the Hubbard model at high temperatures: Triangular versus square lattice
High-temperature bad-metal transport has been recently studied both theoretically and in
experiments as one of the key signatures of strong electronic correlations. Here we use the …
experiments as one of the key signatures of strong electronic correlations. Here we use the …
Investigating ultrafast quantum magnetism with machine learning
We investigate the efficiency of the recently proposed Restricted Boltzmann Machine (RBM)
representation of quantum many-body states to study both the static properties and quantum …
representation of quantum many-body states to study both the static properties and quantum …
Analytic continuation of multipoint correlation functions
Conceptually, the Matsubara formalism (MF), using imaginary frequencies, and the Keldysh
formalism (KF), formulated in real frequencies, give equivalent results for systems in thermal …
formalism (KF), formulated in real frequencies, give equivalent results for systems in thermal …
Single-boson exchange representation of the functional renormalization group for strongly interacting many-electron systems
We present a reformulation of the functional renormalization group (fRG) for many-electron
systems, which relies on the recently introduced single-boson exchange (SBE) …
systems, which relies on the recently introduced single-boson exchange (SBE) …