Energy Transport in One-dimensional Systems – Onuttom Narayan

Date: Thu. September 13th, 2007, 4:15 pm-5:15 pm
Location: Rockefeller 301

In quasi one dimensional systems, the flow of energy has many unusual features. In the first part of this talk, I will show that the heat conductivity diverges in the thermodynamic limit in a large class of such systems. The form of the divergence is shown analytically to be universal. In the second part, I will discuss how disorder makes the flow of energy very slow and creates problems with equilibration. In the third part, I will present numerical results for the non-equilibrium flow of energy in disordered one dimensional systems, leading to an exact identity for wave propagation in nonlinear media.