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SUMMARY:Activity controlled morphologies in effective interactions in mode
 l active matter - Ignacio Pagonabarraga (University of Barcelona)
DTSTART:20250318T130000Z
DTEND:20250318T140000Z
UID:TALK225673@talks.cam.ac.uk
CONTACT:Sarah Loos
DESCRIPTION:Active matter systems are intrinsically out of equilibrium in 
 the absence of any external driving. Their collective behavior emerges  fr
 om a balance between direct interactions and indirect couplings through th
 e medium they move in\, and a self-consistent  dynamical approach is requi
 red to analyze their evolution. The mechanical balance that determines the
 ir collective behavior makes these systems very versatile. An understandin
 g on the basic principles underlying the emergence and self-assembly on ac
 tive systems poses  fundamental challenges.\nI will consider simple models
  to address the fundamental properties of active systems\, which require a
  consistent dynamic treatment\,  and will discuss the generic  implication
 s that the symmetry of self-propulsion has in the emergence of structures 
 in suspensions of model self-propelled particles\, and in complex environm
 ents. I will discuss the interactions between passive inclusions in an act
 ive suspension\, where passive particles couple to the active suspension w
 here their relative dynamics plays an important role in the features that 
 characterize the emergent interactions among the inclusions. Moreover\, fo
 r systems where active particles develop long range polar order\, the pres
 ence of passive obstacles triggers spontaneous macroscopic structures that
  give rise to non-reciprocal interactions. I will also discuss the suscept
 ibility of polar active systems to small inclusions and the implications t
 his has on the nature of their ordered phases\, and will discuss a few con
 sequences that activity has in the emergent behavior of active mixtures an
 d the mechanisms that  promote them.\n\n
LOCATION:Center for Mathematical Sciences\, Lecture room MR4
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