Relaxation dynamics of half-quantum vortices in a two-dimensional two-component Bose-Einstein condensate

We study the relaxation dynamics of quantum turbulence in a two-component Bose-Einstein condensate containing half-quantum vortices. We find a temporal scaling regime for the number of vortices and the correlation lengths that at early times is strongly dependent on the relative strength of the inter-species interaction. At later times we find that the scaling becomes universal, independent of the inter-species interaction, and approaches that numerically observed in a scalar Bose-Einstein condensate. Copyright (C) 2021 The author(s) Published by the EPLA under the terms of the Creative Commons Attribution 4.0 International License (CC BY).

Automated summary

The study reveals that the relaxation dynamics of quantum turbulence in a two-component Bose-Einstein condensate with half-quantum vortices shows temporal scaling at different time scales for the number of vortices and correlation lengths. At early times, this scaling is strongly dependent on the relative strength of the inter-species interaction, while at later times it becomes universal and independent of the inter-species interaction, approaching the behavior observed in a scalar Bose-Einstein condensate.