Physical Chemistry

Lund University

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Jason Lewis: PhysChem Seminar


From: 2020-02-17 14:15 to: 15:00
Place: Lecture hall B
Contact: joakim [dot] stenhammar [at] fkem1 [dot] lu [dot] se
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PhysChem seminar: Jason Lewis, Postdoc of Physical Chemistry, Lund University 


Collective Behaviour in Active Matter: From Birds to Bacteria 


The collective behaviour of animal aggregations, known as swarming, is an ubiquitous natural phenomena which will be familiar to scientists and the general public alike, from the flocking of birds to the motion of human crowds. This is a paradigmatic example of an active system, in which the constituents (animals) consume and dissipate energy at the individual scale in order to convert it into mechanical energy (movement). Such a system is inherently out-of-equilibrium, which allows the constituents to exhibit collective behaviour, amongst many other non-equilibrium phenomena.

In this seminar, I will discuss two systems of active matter: a theoretical description of bird flocks under various biologically motivated constraints, and a model of a suspension of swimming bacteria in chemical gradients, which I will work on here at Lund University.