Motion of defects in the phase ordering process of nematic liquid crystals

Dislinations and monopoles in the phase ordering of three-dimensional nematic liquid crystals follwing a quench are numerically investigated. The total length of dislinations decreases as L ∼ t -0.95±0.07 . Monopoles are not detected except in the early transient regime. It is found that monopoles change to a ring disclination, and rings reconnect to shrink to nothing.