Self-energy-functional approach to systems of correlated electrons
By M. Potthoff. 2003
215 citations recorded by the source corpus.
Abstract:The grand potential of a system of interacting electrons is considered as a stationary point of a self-energy functional. It is shown that a rigorous evaluation of the functional is possible for self-energies that are representable within a certain reference system. The variational scheme allows to construct new non-perturbative and thermodynamically consistent approximations. Numerical results illustrate the practicability of the method.
Subfields: Atomic and Molecular Physics, and Optics, Physical and Theoretical Chemistry
View Paper: https://www.semanticscholar.org/paper/46b94475932c2fabc7c2b0ef8e3c91697e778b0f
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In Atomic and Molecular Physics, and Optics
In Physical and Theoretical Chemistry
Citations in the corpus
- Electronic structure calculations with dynamical mean-field theory (2005, background): “38 in terms of the constraining field in this case rather than the observable G recovers the selfenergy functional approach proposed by Potthoff 2003a, 2003b, 2005 , = − Tr ln G0 −1 − + Y .”
- Quantum cluster theories (2004, methodology): “The self-energy-functional approach developed by Potthoff (2003b) (see also Potthoff et al., 2003) is a very general unifying concept for existing cluster approaches and in addition provides the power to construct novel cluster algorithms.”