# Phase ordering kinetics of a nonequilibrium exciton-polariton condensate

## TL;DR

This paper studies the universal phase ordering dynamics in a nonequilibrium exciton-polariton condensate, revealing different scaling behaviors of vortex-antivortex annihilation depending on system parameters.

## Contribution

It demonstrates that the late-time coarsening process follows universal kinetics with distinct scaling laws, extending understanding of nonequilibrium condensate dynamics.

## Key findings

- Late-time dynamics exhibit universal phase ordering.
- Scaling of correlation functions follows known models.
- Different regimes show distinct dynamical exponents.

## Abstract

We investigate the process of coarsening via annihilation of vortex-antivortex pairs, following the quench to the condensate phase in a nonresonantly pumped polariton system. We find that the late-time dynamics is an example of universal phase ordering kinetics, characterized by scaling of correlation functions in time. Depending on the parameters of the system, the evolution of the characteristic length scale L(t) can be the same as for the two-dimensional XY model, described by a power law with the dynamical exponent z \aprox 2 and a logarithmic correction, or z \aprox 1 which agrees with previous studies of conservative superfluids.