Main navigation | Main content

« fall 2018 - spring 2019 - summer 2019 »

This week | Next week | This semester | All future | Print view

This week | Next week | This semester | All future | Print view

Tuesday, November 20th 2018

11:15 am:

In this talk I will discuss the effects of hydrodynamic

fluctuations in non-relativistic and relativistic setups. Within the

framework of stochastic hydrodynamics I obtain a number of model

independent results, including the long-time tail of different

transport coefficients, and the leading non-analyticity of the

correlators of energy, momentum and particle density in

non-relativistic and relativistic setups. The presence of hydrodynamic

fluctuations induce lower bounds on the transport coefficients by

analyzing the low frequency limit of different correlation functions.

I determine the lower bounds of the bulk viscosity over entropy ratio

in a cold Fermi gas near unitarity. When extending this analysis to

the case of a U(1) conformal relativistic expanding fluid we observe

that the values of the shear viscosity and heat conductivity are

bounded from below. In both setups, non-relativistic and relativistic

one, the lower bounds on the transport coefficients are weakly

dependent on assumptions regarding the range of applicability of fluid

dynamics.

The weekly calendar is also available via subscription to the physics-announce mailing list, and by RSS feed.