Thinking locally: reflections on Dynamical Mean-Field Theory from a high-temperature/high energy perspective

TL;DR

This paper discusses how Dynamical Mean-Field Theory (DMFT) offers insights into local quantum fluctuations and intermediate energy scales in strongly correlated systems, emphasizing its role in understanding material physics.

Contribution

It provides a high-temperature/high-energy perspective on DMFT, highlighting its effectiveness in analyzing local correlations and energy crossovers.

Findings

DMFT captures local quantum fluctuations in strongly correlated systems.

Intermediate energy scales are crucial for understanding material properties.

DMFT serves as a guiding framework for relevant degrees of freedom.

Abstract

When spatial correlations are short-range, the physics of strongly correlated systems is controlled by local quantum fluctuations. In those regimes, Dynamical Mean-Field Theory can be viewed as a `compass' which provides guidance on the relevant degrees of freedom and their effective dynamics over intermediate energy scales. These intermediate energy scales and associated crossovers play a crucial role in the physics of strongly correlated materials.