Oswald, PatrickIgnés i Mullol, Jordi2010-07-052010-07-0520050031-9007https://hdl.handle.net/2445/13265We present experiments where opposed pairs of planar parallel disclination lines of topological strength s=±1 move due to their mutual attraction. Our measurements show that their motion is clearly asymmetric, with +1 defects moving up to twice as fast as -1 ones. This is a clear indication of backflow, given the intrinsic isotropic elasticity of our system. A phenomenological model is able to account for the experimental observations by renormalizing the orientational diffusivity estimated from the velocity of each defect.4 p.application/pdfeng(c) American Physical Society, 2005Cristal·lografiaReologiaCristalls líquidsCrystallographyRheologyLiquid crystalsinfo:eu-repo/semantics/article528074info:eu-repo/semantics/openAccess