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SUMMARY:Thermo-reorientational solitary waves and their interactions in ne
 matic liquid crystals - Cassandra Khan (University of Edinburgh)
DTSTART:20221207T090000Z
DTEND:20221207T093000Z
UID:TALK183746@talks.cam.ac.uk
DESCRIPTION:Co-Authors:&nbsp\;\n\n\nGaetano Assanto\, Universit&agrave\; d
 egli Studi Roma Tre\, Italy\nTim Marchant\, AMSI /The University of Melbou
 rne\, Australia\nNoel F. Smyth\, University of Edinburgh\, UK\nRosa Maria 
 Vargas-Maga&ntilde\;a\, Uni. Nacional Aut&oacute\;noma de M&eacute\;xico\,
  MX&nbsp\;\n\n\nThe propagation and interaction of light-induced thermo-re
 orientational solitary waves in nematic liquid crystals is studied. These 
 thermo-reorientational solitary waves form as the nonlocal refractive inde
 x response to extraordinarily polarized light beams is both self-focusing 
 via the induced rotation of the constituent molecules\, and self-defocusin
 g owing to the temperature increase through optical absorption.\nThese com
 peting nonlinearities can lead to the formation of one- and two-dimensiona
 l multi-humped solitary and ring-shaped waves at high enough optical power
 s\, with a volcano profile in the plane transverse to propagation. For a v
 ector wave scenario\, &nbsp\;interaction between the solitary waves lead t
 o cases where the waves attract or repel depending on the effect of the tw
 o competing nonlinearities.\nThe propagation and interaction of these ligh
 t-induced thermo-reorientational solitary waves is studied using numerical
  solutions of the full governing equations and variational approximations.
  The variational solutions &nbsp\;are in &nbsp\;good agreement with full n
 umerical solutions\, especially given the approximations made in their der
 ivation.
LOCATION:Seminar Room 1\, Newton Institute
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