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- W3000512411 abstract "Dowsons are ±2π point singularities of the unitary complex order parameter exp[iϕ(x, y)] characterizing the so-called dowser texture in a thin nematic layer with homeotropic boundary conditions. Dowsons are therefore similar to disclinations in freely-standing smectic C films or to vortices in two-dimensional superfluids or superconductors. Using especially tailored setups called dowsons colliders, pairs of dowsons of opposite signs are generated and set into motion on closed counter-rotating trajectories leading to collisions. In first approximation, the velocity of dowsons is orthogonal and proportional to the local phase gradient. The outcome of collisions, i.e. either annihilation or bypass, depends on the distance of trajectories ∆ϕ in terms of the phase: for ∆ϕ π the dowsons are passing by. This rule is valid only for quasi-static stationary wound up textures and can be easily broken by application of a Poiseuille flow in an appropriate direction." @default.
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- W3000512411 date "2020-01-14" @default.
- W3000512411 modified "2023-10-18" @default.
- W3000512411 title "On Generation, Motions, and Collisions of Dowsons" @default.
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- W3000512411 doi "https://doi.org/10.3389/fphy.2019.00238" @default.
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