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SUMMARY:Field theories of active matter - Gunnar Pruessner\, Imperial Coll
 ege London
DTSTART:20230321T130000Z
DTEND:20230321T140000Z
UID:TALK197038@talks.cam.ac.uk
CONTACT:Camille Scalliet
DESCRIPTION:Field theory has been one of the most successful methods for t
 he characterisation of many-body systems for many decades. Different flavo
 urs of field theory\, in particular the response-field formalism and Doi-P
 eliti field theory\, have different advantages\, with the latter maintaini
 ng particle entity by construction. The particulate nature of the degrees 
 of freedom is of great importance to their entropy production and to activ
 e matter as a whole.\nIn this presentation\, I will briefly contrast the t
 wo approaches\, before focussing on applications of Doi-Peliti field theor
 y to active matter. Two of those are: 1) Calculating entropy production in
  active matter systems generally and 2) identifying the microscopic mechan
 ism whereby repulsive pair-potentials become effectively attractive in the
  presence of self-propulsion\, which underlies motility induced phase sepa
 ration.\nSome food and some food for thought will be provided.
LOCATION:Center for Mathematical Sciences\, Lecture room MR4
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