Mode coupling theory

Mode Coupling Theory (MCT) is a framework used to understand how liquids and glasses behave as they cool and become more viscous. It describes how particles' movements slow down because their motions become increasingly interconnected or "coupled," leading to a dramatic increase in relaxation times. Essentially, MCT predicts how a liquid approaches a glassy, rigid state by analyzing the interactions and collective dynamics of particles, helping scientists understand the slowing dynamics near the glass transition without requiring detailed descriptions of every particle.