Minicourse "Computer Simulation of Polymers: Entanglements and Topological Constraints", May 27-28, 2019

Prof. Ralf Everaers, ENS Lyon, France
Prof. Angelo Rosa, SISSA, Trieste, Italy
Monday, 27 May 2019 to Tuesday, 28 May 2019
10:00 - 16:30
Conference Hall, Room 401 Moscow Independent University

Skoltech and Interdisciplinary Scientific Center Poncelet announce a minicourse  (May 27-28, 2019,  Independent University of Moscow, room 401,  1000 - 16-30)

Computer Simulation of Polymers: Entanglements and Topological Constraints by 

Ralf EVERAERS (ENS, Lyon, France)

Angelo ROSA (SISSA, Trieste, Italy)


Schedule of lectures: (Bolshoy Vlasyevsky pereulok, 11):

May 27: 

  • 10:00 – 11:30:   Ralf Everaers   
  • 12:00 – 13:30:   Ralf Everaers 
  • 15:00 – 16:30:   Angelo Rosa  

May 28: 

  • 10:00 – 11:30:    Angelo Rosa
  • 12:00 – 13:30:    Ralf Everaers
  • 15:00 – 16:30:    Angelo Rosa

Summary of lectures:

Ralf Everers, Computer simulations of entangled polymers  (three lectures)

Diffusing polymers can slide past each other, but their Brownian motion is subject to transient topological constraints, since the chain backbones cannot cross. The microscopic «entanglements» dominate the characteristic viscoelastic behavior, which polymers display macroscopically. In my lecture, I will first review the Rouse and the Edwards/de Gennes tube models of polymer dynamics. In the second part, I will introduce the Kremer-Grest bead-spring model and computational techniques used for simulating these generic model systems. The central part of the lecture focuses on the question, how computer simulations can be used to explore the physics underlying the tube model. In the final part, I discuss how to design material-specific Kremer-Grest models for commodity polymer melts.

Angelo Rosa, From eukaryotic chromosomes to physics of crumpled ring polymers (three lectures)

In these lectures, I will first introduce the audience to the relevant phenomenology of chromosome organization inside the nuclei of eukaryotic cells. Then, by employing simple and generic physical arguments, I will discuss how chromosome folding can be understood based on the analogy to unknotted and unlinked ring polymers which adopt "crumpled" conformations in dense solutions. The explanation of this analogy will offer the opportunity to discuss in detail the rich phenomenology of ring polymers: in particular, I will report about recent theoretical and computational work addressing the debated connection between ring polymers and melts of branched polymers.


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