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SUMMARY:Entropy Induced Organization and Dynamics of Topologically Modifie
 d Ring-polymers - Shreerang Pande (Indian Institute of Science Education a
 nd Research (IISER))
DTSTART:20250911T142000Z
DTEND:20250911T142500Z
UID:TALK233344@talks.cam.ac.uk
DESCRIPTION:The physics of Topologically Modified polymers (ToMo polymers)
  is of interest because of its&nbsp\;direct relevance to understand chromo
 some organization in cells. We have been investigating ToMo ring polymers\
 , which have internal loops along the chain contour\, and its emergent org
 anization inside cylindrical confinement. We used these localization prope
 rties of suitably &ldquo\;designed&rdquo\; polymer topologies to understan
 d the underlying spatio-temporal dynamics of chromosomes in the bacterial 
 cell E. coli [1\,2\,3]. In this presentation\, I will be focusing on the p
 rinciples of entropic organization of some segments of the polymer along t
 he long axis of the cylinder. Further investigations show how (i) we can m
 odulate entropic interactions between internal loops to induce alignment o
 f polymers segments along the cylinder long-axis\, reminiscent of Ising li
 ke interactions of magnetic spin and (ii) how suitably &ldquo\;designed&rd
 quo\; topological modifications can be used to localize certain sections o
 f a polymers to the regions closer to the surface of a sphere [4].&nbsp\;\
 n[1] D. Mitra\, Shreerang Pande\, A. Chatterji. Phys. Rev.E\, 106\, 054502
  (2022).&nbsp\;\n[2] D. Mitra\, Shreerang Pande\, A. Chatterji. Soft Matte
 r\, 18\, 5615 (2022).&nbsp\;\n[3] Shreerang Pande\, D. Mitra\, A. Chatterj
 i. Phys. Rev E\, 110\, 054401 (2024).&nbsp\;\n[4] K. Roychoudhury\, Shreer
 ang Pande\, Indrakanty S.S.\, D. Mitra\, A. Chatterji\, arXiv:2501.02276 -
  Undergoing review in Phys. Rev E&nbsp\;
LOCATION:External
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