Emergent interactions in conditioned processes: a route to smart matter?

Condensed Matter lunchtime seminar

Emergent interactions in conditioned processes: a route to smart matter?

  • Event time: 1:00pm until 2:00pm
  • Event date: 26th August 2019
  • Speaker: (School of Physics & Astronomy, University of Edinburgh)
  • Speaker: Francesco Cagnetta (Formerly School of Physics & Astronomy, University of Edinburgh)
  • Location: Room 2511,

Event details

We propose a method to derive `smart' active-matter interactions, such as collision avoidance, from first principles. Begin from a system with naive interactions, for example hardcore exclusion, and identify the natural fluctuations which by serendipity yield a high value of some relevant constituent performance, like mobility: in the effective dynamics describing these fluctuations smart interactions emerge. As a proof of concept, we examine two one-dimensional models of active matter: the totally asymmetric exclusion process and run-and-tumble particles. We show that the energy efficiency of motion, limited by particle collisions, can be increased up to a point of diminishing returns by conditioning on high mobility. Particular to the second model is the emergence of alignment interactions that allow substantial gains in efficiency, by preventing jamming without increasing energy consumption. We close by presenting features of our approach that go beyond the two models considered.

About Condensed Matter lunchtime seminars

This is a weekly series of informal talks given primarily by members of the soft condensed matter and statistical mechanics groups, but is also open to members of other groups and external visitors. The aim of the series is to promote discussion and learning of various topics at a level suitable to the broad background of the group. Everyone is welcome to attend..

Find out more about Condensed Matter lunchtime seminars.