A review argues that polar and nematic order frequently coexist in active biological matter, so unified mixed-symmetry models are needed to describe it.
String Formation and Arrested Ordering Kinetics in Nematics Induced by Polar Particles
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abstract
Our study explores the mixture of polar particles in apolar environment. We employ a coarse-grained approach to model the mixture, where polar particles are in minority. The interaction between polar and apolar components is incorporated via a coupling term in the free energy. Coupling generates local interaction in the system which results in the formation of string like structures connecting a pair of half integer topological defects. The increase in the coupling strength or the density of polar particles results in the: Sharper strings with larger probability of connecting the topological defects of same charge and the enhanced dynamics of topological defects. However, the ordering kinetics of the system shows the delayed coarsening for larger coupling or polar density. Our results can be used to develop controlled kinetics as well as to detect the impurities in liquid crystals.
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cond-mat.soft 1years
2025 1verdicts
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The Interplay of Polar and Nematic Order in Active Matter: Implications for Non-Equilibrium Physics and Biology
A review argues that polar and nematic order frequently coexist in active biological matter, so unified mixed-symmetry models are needed to describe it.