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SUMMARY:Reverse Engineering of Design Principles using Biased Dynamics - M
 ike Cates (University of Cambridge)
DTSTART:20190115T170000Z
DTEND:20190115T180000Z
UID:TALK116899@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:Suppose we want to create a material with a certain unusual pr
 operty. One strategy is to start with a model of an existing material with
 out that property\, and bias its dynamics to sample unlikely trajectories 
 for which the atypical property is pres ent. Looking at the biased traject
 ories\, it may be possible to spot some choice of local interactions that 
 would achieve the required effect. I will describe an instance of this in 
 the realm of self-propelled spherical colloids. Here\, biasing the ensembl
 e to reduce colloidal collisions creates states in which the propulsion di
 rections have polar order: accordingly\, collisions can be reduced by intr
 oducing polar interactions. While this particular outcome is relatively ob
 vious\, the method is generalizable in principle to more complex cases whe
 re genuinely new design principles might emerge.<br> <br> Coauthors:  Taka
 hiro Nemoto\, &Eacute\;tienne Fodor\, Robert L. Jack\, Julien Tailleur<br>
  <br> Reference: Optimizing active work: dynamical phase transitions\, col
 lective motion and jamming. T. Nemoto et al\, arXiv 1805.02887
LOCATION:Seminar Room 1\, Newton Institute
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