# Quantitative aspects of the dynamical impurity approach

Source: [Quantitative aspects of the dynamical impurity approach](<https://www.sota2.com/research/paper/68fa343b1e209131ce896fb1>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T20:31:20.587Z

Authors: K.Pozgajcic

Published: 2004-07-07T14:33:36.000Z

## Abstract

A calculation technique in the context of the self-energy functional approach  (SFA) and its local form, the dynamical impurity approach  (DIA), will be proposed. This technique allows for a precise calculation of the derivatives of the grand potential functional used in the search for a stationary point. To make a closer comparison of the DIA with the dynamical mean-field theory (DMFT), and to demonstrate the proposed technique, we calculated paramagnetic U-T phase diagram of the Hubbard model at half-filling, which exhibits metal-insulator transition.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/cond-mat/0407172>)

[PDF](<https://arxiv.org/pdf/cond-mat/0407172.pdf>)