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  1. Article

    Open Access

    T-matrix formulation of real-space dynamical mean-field theory and the Friedel sum rule for correlated lattice fermions

    We formulate real-space dynamical mean-field theory within scattering theory. Thereby the Friedel sum rule is derived for interacting lattice fermions at zero temperature.

    Krzysztof Byczuk, Banhi Chatterjee, Dieter Vollhardt in The European Physical Journal B (2019)

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  2. No Access

    Chapter

    Dynamical Mean-Field Theory

    The dynamical mean-field theory (DMFT) is a widely applicable approximation scheme for the investigation of correlated quantum many-particle systems on a lattice, e.g., electrons in solids and cold atoms in op...

    Dieter Vollhardt, Krzysztof Byczuk, Marcus Kollar in Strongly Correlated Systems (2012)

  3. No Access

    Chapter and Conference Paper

    Local Moment Approach to Multi-Orbital Anderson and Hubbard Models

    The variational local moment approach (V-LMA), being a modification of the method due to Logan et al., is presented here. The existence of local moments is taken from the outset and their values are determined th...

    Anna Kauch, Krzysztof Byczuk in Quantum Magnetism (2008)