Diagrammatic routes to nonlocal correlations beyond dynamical mean field theory
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"Diagrammatic routes to nonlocal cor..." refers background in this paper
...Non-local correlations, on the other hand, are at the heart of some of the most fascinating physical phenomena such as high-temperature superconductivity (Bednorz and Müller, 1986) and quantum criticality (v. Löhneysen et al., 2007)....
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"Diagrammatic routes to nonlocal cor..." refers background or methods in this paper
...In ED, the two-particle Green’s function (1) can be computed with a relatively simple algorithmic extension of the standard ED implementation used in the context of DMFT (Georges et al., 1996)....
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...The Lanczos algorithm (Georges et al., 1996), which simplifies the calculation of the single-particle Green’s function, cannot directly be applied to the two-particle Green’s function....
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...They bring forth, among others, quasiparticle renormalizations, Mott-Hubbard metal-insulator transitions, orbital, charge and magnetic ordering, see Georges et al., 1996 for a review....
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...For more details of the method and its multiorbital extensions, see the reviews of Georges et al., 1996 and Held, 2007, and for a first reading Kotliar and Vollhardt, 2004....
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