Results 161 to 170 of about 9,455 (196)

DMFT Impurity Solvers

2021
We describe different impurity solvers used in DMFT. Namely, we show details for three most popular types of solvers: analytical, exact (Hamiltonian-based), and stochastic (quantum–Monte Carlo-based) solvers. Since continuous-time quantum Monte Carlo is the current state-of-art approach to solve the impurity problem, we discuss in detail this and its ...
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The dmfs and dmft of young South African children

Community Dentistry and Oral Epidemiology, 1989
Abstract – As part of a series of frequent epidemiological field studies to determine caries prevalences in the primary dentition of young South African children, 1436 children of 1–4 yr of age from five ethnic groups were examined. Using WHO diagnostic criteria decayed, missing, and filled surfaces were determined with mirror and probe and
P E, Cleaton-Jones, J A, Hargreaves, G, Roberts, S D, Williams, T I, Leidal   +4 more
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Merging GW with DMFT

2015
Die vorliegende Arbeit besteht aus zwei Teilen. Der erste Teil deckt im wesentlichen Literatur von Vielelektronensystemen in kondensierter Materie ab und fasst alle theoretischen Grundlagen zusammen, die notwendig sind um die GW-Näherung der Schwinger-Dyson- Gleichungen mit der Dynamischen Molekularfeldtheorie (DMFT) zu kombinieren. Die Vereinigung von
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Generalizations of DMFT, CPA and NCA

2003
Local and non-local generalizations of dynamical mean-field theory (DMFT) are presented. They come from a self-avoiding walk in a hypercubic lattice, in which the principle of exclusion and inclusion is used. The coherent potential approximation (CPA) can be treated in a similar way. CPA and DMFT can be mapped onto each other. The numerical corrections
H. Keiter, K. Baumgartner, Dirk Otto
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CPITN, DMFT, and treatment requirements in a Nicaraguan population

Community Dentistry and Oral Epidemiology, 1993
Abstract – WHO basic methods were used to assess CPITN, DMFT, and treatment requirements in a population of 178 persons aged 12–64 yr living in urban and rural areas of Nicaragua. Two groups were examined: individuals presenting for dental treatment at health clinics (30%) and subjects chosen randomly at other locations (70%).
A C, Smith, W P, Lang
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Extensions of DMFT to the Nonlocal Case

2021
In this chapter, we discuss how to include nonlocal correlations in DMFT. These correlations are important in many cases, including low-dimensional systems and/or systems close to phase transitions. We pay a special attention to one of the most popular nonlocal approaches—dynamical vertex approximation (DΓA), where one includes local-in-space but ...
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Evaluation of the impact of regular control visits on dmft and DMFT indexes

2004
info:eu-repo/semantics ...
Jurysta, Cédric, Vanden Abbeele, Astrid
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DMFT band calculation for Ce compounds

Journal of Magnetism and Magnetic Materials, 2007
Abstract Recent development of DMFT band calculation for Ce compounds is reported. The auxiliary impurity Anderson model is solved by a method named NCAf 2 vc , which can include the correct exchange process of f 1 → f 0 , f 2 fluctuation and also the crystalline field (CF) and spin–orbit splitting of self ...
O. Sakai, Y. Shimizu
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Multi-orbital and Cluster DMFT

2021
In this chapter, we present generalizations of the one-orbital one-atom-cell Hubbard model on the multi-orbital and cluster (several atoms in the unit cell) cases. We begin with derivation of the DMFT equations in the multi-orbital case and proceed with the cluster DMFT.
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Diagrammatic methods beyond DMFT

2014
Das Verstaendnis von elektronischen Korrelationsphaenomenen stellt eine der groeßten Her- ausforderungen der Festkoerperphysik dar. In den letzten 25 Jahren hat sich die dynamische Molekularfeldtheorie (DMFT) als die "Standardmethode" fuer korrelierte fermionische Systeme etabliert, welche weit ueber eine stoerungstheoretische Behandlung hinausgeht und
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