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SUMMARY:Defects of Liquid Crystals - Pingwen Zhang (Peking University)
DTSTART:20190116T094500Z
DTEND:20190116T103000Z
UID:TALK116950@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:Defects are local breakings of symmetry in an ordered medium\,
  which can be found in various fields of physics such as solids\, liquid c
 rystals\, astrophysics and high energy physics. Defects in liquid crystals
  are of great practical importance in material science and theoretical int
 erest in physics and mathematics. In this talk\, I will review the represe
 ntation\, modeling and computation of defects in liquid crystals.  Within 
 the Landau-de Gennes tensor model\, we found a rich variety of defect patt
 erns in topologically confined nematic liquid crystals\, and the profiles 
 of point defect and disclination line are obtained. The connection and dif
 ference between defect patterns under the tensor model and the vector mode
 l will be discussed. Finally\, some conjectures and challenges are propose
 d to summarize the common characteristics of defects\, in the hope of prov
 iding a deeper understanding of the defect pattern in nematic liquid cryst
 als.
LOCATION:Seminar Room 1\, Newton Institute
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