# Predicting The Effective Temperaure of a Glass

## TL;DR

This paper demonstrates that for strongly correlating liquids, the effective temperature of a glass depends solely on the final density or temperature jump, allowing predictions from a single equilibrium simulation.

## Contribution

It introduces a predictive method for the effective temperature of glasses in strongly correlating liquids based on initial equilibrium data, validated through simulations.

## Key findings

- Effective temperature depends only on final density or temperature jump.
- Prediction method works for strongly correlating liquids like Lennard-Jones.
- Method does not apply to non-strongly correlating liquids.

## Abstract

We explain the findings by Di Leonardo et al. [Phys. Rev. Lett. 84, 6054 (2000)] that the effective temperature of a Lennard-Jones glass depends only on the final value of the density in the volume and/or temperature jump that produces the glass phase. This is not only a property of the Lennard-Jones liquid, but a feature of all strongly correlating liquids. For such liquids data from a single quench simulation provides enough information to predict the effective temperature of any glass produced by jumping from an equilibrium state. This prediction is validated by simulations of the Kob-Andersen binary Lennard-Jones liquid and shown not to apply for the non-strongly correlating monatomic Lennard-Jones Gaussian liquid.