Strong Coupling Effects in Binary Yukawa Systems

TL;DR

This paper investigates how strong coupling influences collective excitations in binary Yukawa systems, revealing a shift from light to heavy component dominance in oscillation frequencies as correlation strength increases.

Contribution

It provides a theoretical and simulation-based analysis of the transition in mode behavior from weak to strong coupling in binary Yukawa systems.

Findings

Weak coupling mode frequency governed by light component

Strong coupling mode frequency governed by combined mass with heavy component dominance

Simulations confirm theoretical predictions across full coupling range

Abstract

We analyze the acoustic collective excitations in two- and three-dimensional binary Yukawa systems, consisting of two components with different masses. Theoretical analysis reveals a profound difference between the weakly and strongly correlated limits: at weak coupling the two components interact via the mean field only and the oscillation frequency is governed by the light component. In the strongly correlated limit the mode frequency is governed by the combined mass, where the heavy component dominates. Computer simulations in the full coupling range extend and confirm the theoretical results.