Towards Analytical Approaches to the Dynamical-Cluster Approximation
نویسندگان
چکیده
منابع مشابه
Dynamical Cluster Approximation
The dynamical cluster approximation (DCA) is a method which systematically incorporates nonlocal corrections to the dynamical mean-field approximation. Here we present a pedagogical discussion of the DCA by describing it as a ̊-derivable coarse-graining approximation in k-space, which maps an infinite lattice problem onto a periodic finite-sized cluster embedded in a self-consistently determine...
متن کاملDynamical cluster approximation employing the fluctuation exchange approximation as a cluster solver
We employ the dynamical cluster approximation ~DCA! in conjunction with the fluctuation exchange approximation ~FLEX! to study the Hubbard model. The DCA is a technique to systematically restore the momentum conservation at the internal vertices of Feynman diagrams relinquished in the dynamical mean field approximation. The FLEX is a perturbative diagrammatic approach in which classes of Feynma...
متن کاملDynamical cluster approximation: Nonlocal dynamics of correlated electron systems
We recently introduced the dynamical cluster approximation ~DCA!, a technique that includes short-ranged dynamical correlations in addition to the local dynamics of the dynamical mean-field approximation while preserving causality. The technique is based on an iterative self-consistency scheme on a finite-size periodic cluster. The dynamical mean-field approximation ~exact result! is obtained b...
متن کاملAnalytical approaches to genomic evolution.
We model the non-local mechanisms of genomic evolution and propose methods for studying the evolutionary divergence of species based on these models. Mechanisms include the movement of segments of genomes within a single chromosome (transpositions), the reciprocal translocation of segments between two chromosomes, and the inversion of segments. Each of these is studied in the context of a diffe...
متن کاملDynamical Systems Approaches to Cognition
Think of a little boy playing in the playground, climbing up on ladders, balancing on beams, jumping, running, catching other kids. Or think of a girl who prepares to draw a picture, finding and setting up her painting utensils, dipping the brush in water, carefully wiping it off, whipping up the water paint of the selected color with small circular movements, the brush just touching the pad of...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Low Temperature Physics
سال: 2009
ISSN: 0022-2291,1573-7357
DOI: 10.1007/s10909-009-0061-2