Type: 
Colloquium
Date-Time: 
Monday, April 21, 2014 - 16:00 to 17:00
Location: 
Weniger 116
Event Speaker: 
Prof. John Toner, Department of Physics, University of Oregon
Local Contact: 
Zwolak
Abstract: 

I'll present a hydrodynamic theory of "polar active smectics", which are "active" (e.g., living) systems that spontaneously layer. These prove to be far more ordered than their equilibrium counterparts, and exhibit a dynamical "Kosterlitz-Thouless" transition when they melt. I'll also discuss the surprising connection between these systems and non-equilibrium Bose-Einstein condensation, which leads to the rather surprising conclusion that two dimensional non-equilibrium superfluidity is impossible in isotropic systems, but possible in anisotropic ones.