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Optical conductivity in cluster dynamical mean field theory: formalism and application to high temperature superconductors
Nan Lin, Emanuel Gull, A. J. Millis
The optical conductivity of the one-band Hubbard model is calculated using the 'Dynamical Cluster Approximation' implementation of dynamical mean field theory for parameters approp…
Momentum-sector-selective metal-insulator transition in the eight-site dynamical mean-field approximation to the Hubbard model in two dimensions
Emanuel Gull, Olivier Parcollet, Philipp Werner +1
We explore the momentum-sector-selective metal insulator transitions recently found in the eight - site dynamical cluster approximation to the two-dimensional Hubbard model. The ph…
Diagrammatic Monte Carlo for Correlated Fermions
E. Kozik, K. Van Houcke, E. Gull +4
We show that Monte Carlo sampling of the Feynman diagrammatic series (DiagMC) can be used for tackling hard fermionic quantum many-body problems in the thermodynamic limit by prese…
Antiferromagnetism and the gap of a Mott insulator: Results from analytic continuation of the self-energy
Xin Wang, Emanuel Gull, Luca de' Medici +2
Direct analytic continuation of the self energy is used to determine the effect of antiferromagnetic ordering on the spectral function and optical conductivity of a Mott insulator.…
Two-stage metal-insulator transition in the 2D Hubbard model: momentum selectivity in the 8-site dynamical cluster approximation
Philipp Werner, Emanuel Gull, Olivier Parcollet +1
Metal-insulator transitions in the paramagnetic phase of the two dimensional square lattice Hubbard model are studied using the dynamical cluster approximation with eight momentum…