Dagvadorj, G;
Comaron, P;
Szymańska, MH;
(2023)
Full and fractional defects across the Berezinskii-Kosterlitz-Thouless transition in a driven-dissipative spinor quantum fluid.
Physical Review Research
, 5
(4)
, Article 043286. 10.1103/physrevresearch.5.043286.
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Abstract
We investigate the properties of a two-dimensional spinor microcavity polariton system driven by a linearly polarized continuous pump. In particular, we establish the role of the elementary excitations, namely, the socalled half-vortices and full vortices; these objects carry a quantum rotation only in one of the two, or both, spin components, respectively. Our numerical analysis of the steady state shows that it is only the half-vortices that are present in the vortex-antivortex pairing and dissociation responsible for the Berezinskii-Kosterlitz-Thouless transition. These are the relevant elementary excitations close to the critical point. However, by exploring the phase-ordering dynamics following a sudden quench across the transition we prove that full vortices become the relevant excitations away from the critical point in a deep quasi-ordered state at late times. The time scales for half-vortices binding into full vortices are much faster than the vortex-antivortex annihilations.
| Type: | Article |
|---|---|
| Title: | Full and fractional defects across the Berezinskii-Kosterlitz-Thouless transition in a driven-dissipative spinor quantum fluid |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/physrevresearch.5.043286 |
| Publisher version: | http://dx.doi.org/10.1103/physrevresearch.5.043286 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third-party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10185020 |
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