Unifying polar and nematic active matter: Emergence and co-existence of half-integer and full-integer topological defects
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Unifying polar and nematic active matter : Emergence and co-existence of half-integer and full-integer topological defects. / Amiri, Aboutaleb; Mueller, Romain; Doostmohammadi, Amin.
In: Journal of Physics A: Mathematical and Theoretical, Vol. 55, No. 9, 094002, 04.03.2022.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Unifying polar and nematic active matter
T2 - Emergence and co-existence of half-integer and full-integer topological defects
AU - Amiri, Aboutaleb
AU - Mueller, Romain
AU - Doostmohammadi, Amin
N1 - Publisher Copyright: © 2022 The Author(s). Published by IOP Publishing Ltd.
PY - 2022/3/4
Y1 - 2022/3/4
N2 - The presence and significance of active topological defects is increasingly realised in diverse biological and biomimetic systems. We introduce a continuum model of polar active matter, based on conservation laws and symmetry arguments, that recapitulates both polar and apolar (nematic) features of topological defects in active turbulence. Using numerical simulations of the continuum model, we demonstrate the emergence of both half- and full-integer topological defects in polar active matter. Interestingly, we find that crossover from active turbulence with half-to full-integer defects can emerge with the coexistence region characterized by both defect types. These results put forward a minimal, generic framework for studying topological defect patterns in active matter which is capable of explaining the emergence of half-integer defects in polar systems such as bacteria and cell monolayers, as well as predicting the emergence of coexisting defect states in active matter.
AB - The presence and significance of active topological defects is increasingly realised in diverse biological and biomimetic systems. We introduce a continuum model of polar active matter, based on conservation laws and symmetry arguments, that recapitulates both polar and apolar (nematic) features of topological defects in active turbulence. Using numerical simulations of the continuum model, we demonstrate the emergence of both half- and full-integer topological defects in polar active matter. Interestingly, we find that crossover from active turbulence with half-to full-integer defects can emerge with the coexistence region characterized by both defect types. These results put forward a minimal, generic framework for studying topological defect patterns in active matter which is capable of explaining the emergence of half-integer defects in polar systems such as bacteria and cell monolayers, as well as predicting the emergence of coexisting defect states in active matter.
KW - active matter
KW - nematic
KW - polar
KW - topological defects
U2 - 10.1088/1751-8121/ac4abe
DO - 10.1088/1751-8121/ac4abe
M3 - Journal article
AN - SCOPUS:85124379355
VL - 55
JO - Journal of Physics A: Mathematical and Theoretical
JF - Journal of Physics A: Mathematical and Theoretical
SN - 1751-8113
IS - 9
M1 - 094002
ER -
ID: 301460573