Berezinskii-Kosterlitz-Thouless transition of two-component Bose mixtures with inter-component Josephson coupling
Statistical Mechanics
2019-08-22 v2 Superconductivity
High Energy Physics - Theory
Abstract
We study the Berezinskii-Kosterlitz-Thouless (BKT) transition of two-component Bose mixtures in two spatial dimensions. When phases of both components are decoupled, half-quantized vortex-antivortex pairs of each component induce two-step BKT transitions. On the other hand, when phases of the both components are synchronized through the inter-component Josephson coupling, two species of vortices of each component are bind to form a molecule, and in this case, we find that there is only one BKT transition by molecule-antimolecule pairs. Our results can be tested by two weakly-connected Bose systems such as two-component ultracold dilute Bose mixtures with the Rabi oscillation, and multiband superconductors.
Keywords
Cite
@article{arxiv.1802.08763,
title = {Berezinskii-Kosterlitz-Thouless transition of two-component Bose mixtures with inter-component Josephson coupling},
author = {Michikazu Kobayashi and Minoru Eto and Muneto Nitta},
journal= {arXiv preprint arXiv:1802.08763},
year = {2019}
}
Comments
11 pages, 9 figures