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SUMMARY:Inferring universal properties of critical fields from dragged col
 loids - Benjamin Walter\, SISSA
DTSTART:20220125T130000Z
DTEND:20220125T140000Z
UID:TALK167891@talks.cam.ac.uk
CONTACT:Camille Scalliet
DESCRIPTION:Non-equilibrium field theories are an effective description fo
 r the spatial and temporal fluctuations of order parameters in complex sys
 tems out of equilibrium. Near critical points\, their statistics assumes u
 niversal shapes and is characterised by few critical exponents. Often\, ho
 wever\, the field's statistics itself is difficult to access experimentall
 y because it requires detailed measurements across large spatial scales.\n
 To overcome this limitation\, we (theoretically) insert a colloid\, i.e. a
  small particle with a finite interaction radius\, into the field. The mut
 ual interaction between the colloid and the field induces memory into the 
 stochastic evolution of the colloid. By way of a diagrammatic perturbation
  theory\, I show how these memory terms can be predicted to leading pertur
 bative order in the coupling strength\, and further can be used to infer c
 ritical exponents of the surrounding field.
LOCATION:Center for Mathematical Sciences\, Lecture room MR11\, or https:/
 /maths-cam-ac-uk.zoom.us/j/98016675669
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