ICTS

It is common to describe physical systems using two different approaches --- the microscopic one based on writing equations of motion for the constituent atoms (Newton's equations for classical system) and the macroscopic one based on  hydrodynamic equations for coarse-grained observables.  Restricting mostly to the case of one-dimensions, I will discuss the connections between these two approaches.  In particular the talk will focus on  macroscopic laws such as  Fourier's law of heat conduction, fluctuating hydrodynamics and the Navier Stokes equations.