Multiscale simulations in simple metals: a density-functional based methodology

TL;DR

This paper introduces a formalism that couples density functional theory with classical simulations to enable efficient multiscale modeling of simple metallic systems, particularly where localized quantum effects influence macroscopic properties.

Contribution

It presents a novel coupling methodology for quantum and classical simulations tailored for simple metals, facilitating multiscale analysis of localized quantum regions within larger systems.

Findings

Successfully coupled DFT-based quantum simulation with classical methods for aluminum.

Demonstrated the approach's efficiency in multiscale simulations of metallic systems.

Applicable to systems where localized quantum effects impact bulk properties.

Abstract

We present a formalism for coupling a density functional theory-based quantum simulation to a classical simulation for the treatment of simple metallic systems. The formalism is applicable to multiscale simulations in which the part of the system requiring quantum-mechanical treatment is spatially confined to a small region. Such situations often arise in physical systems where chemical interactions in a small region can affect the macroscopic mechanical properties of a metal. We describe how this coupled treatment can be accomplished efficiently, and we present a coupled simulation for a bulk aluminum system.