Characterization of the vortex-pair interaction law and nonlinear mobility effects

Characterization of the vortex-pair interaction law and nonlinear mobility effects

Blog Article

Employing nematic liquid crystals in a homeotropic cell with a Western Saddle photosensitive wall, dissipative vortex pairs are selectively induced by external illumination and the interaction law is characterized for pairs of opposite topological charges.Contrary to the phenomenological fit with a force inversely proportional to the distance, the Loose Figure data provide evidence that nonlinear mobility effects must be taken into account.The observations lead to a reconciliation of experiments with theory.