The role of friction in multidefect ordering
Physical Review Letters American Physical Society 125 (2020) 218004
Abstract:
We use continuum simulations to study the impact of friction on the ordering of defects in an active nematic. Even in a frictionless system, +1/2 defects tend to align side by side and orient antiparallel reflecting their propensity to form, and circulate with, flow vortices. Increasing friction enhances the effectiveness of the defect-defect interactions, and defects form dynamically evolving, large-scale, positionally, and orientationally ordered structures, which can be explained as a competition between hexagonal packing, preferred by the −1/2 defects, and rectangular packing, preferred by the +1/2 defects.A systematic $1/c$-expansion of form factor sums for dynamical correlations in the Lieb-Liniger model
(2020)
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