Regular and Chaotic States in a Local Map Description of Sheared Nematic Liquid Crystals

Details Regular and Chaotic States in a Local Map Description of Sheared Nematic Liquid Crystals Regular and Chaotic States in a Local Map Description of Sheared Nematic Liquid Crystals

2008-01-25

arxiv.org/abs/0801.3876v2

Physics

Condensed Matter

Soft Condensed Matter

11 pages, higher quality figures available on request, references added

Scientific paper

10.1103/PhysRevE.78.011706

We propose and study a local map capable of describing the full variety of dynamical states, ranging from regular to chaotic, obtained when a nematic liquid crystal is subjected to a steady shear flow. The map is formulated in terms of a quaternion parametrization of rotations of the local frame described by the axes of the nematic director, subdirector and the joint normal to these, with two additional scalars describing the strength of ordering. Our model yields kayaking, wagging, tumbling, aligned and coexistence states, in agreement with previous formulations based on coupled ordinary differential equations. Such a map can serve as a building block for the construction of lattice models of the complex spatio-temporal states predicted for sheared nematics.

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