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Integer defects in active nematics of ellipsoidal Quincke rollers
Abstract
Transverse propulsion changes topological ordering in dense ellipsoidal Quincke rollers. Under an alternating-current electric field, a polar velocity field coexists with perpendicular nematic particle alignment. The system supports integer +1 velocity vortices with radial particle axes and -1 saddle defects. Oppositely charged defects migrate along domain walls and annihilate as polar domains merge. These results identify propulsion direction relative to particle shape as a control parameter for defect textures and collective ordering.
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BibTeX
@misc{fan2026integer,
title = {{Integer defects in active nematics of ellipsoidal Quincke rollers}},
author = {Bao Ying Fan and Lin Liu and Jie Wu and Chen Song and Wen-de Tian and Kang Chen and Tian Hui Zhang},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.41463},
eprint = {2610.41463},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.41463},
}
RIS
TY - UNPB
TI - Integer defects in active nematics of ellipsoidal Quincke rollers
AU - Bao Ying Fan
AU - Lin Liu
AU - Jie Wu
AU - Chen Song
AU - Wen-de Tian
AU - Kang Chen
AU - Tian Hui Zhang
PY - 2026
DA - 2026/10/30
PB - arXiv
DO - 10.48550/arxiv.2610.41463
UR - https://arxiv.org/abs/2610.41463
AB - Transverse propulsion changes topological ordering in dense ellipsoidal Quincke rollers. Under an alternating-current electric field, a polar velocity field coexists with perpendicular nematic particle alignment. The system supports integer +1 velocity vortices with radial particle axes and -1 saddle defects. Oppositely charged defects migrate along domain walls and annihilate as polar domains merge. These results identify propulsion direction relative to particle shape as a control parameter for defect textures and collective ordering.
ER -