High Energy Physics Seminar: Dr. Mauricio Martinez Guerrero (North Carolina State University)  Add To Calendar

  • Date(s): Wednesday, 10/31 11:00 AM to Wednesday, 10/31 12:00 PM
  • Speaker: Dr. Mauricio Martinez Guerrero
  • Host: Prof. Ho-Ung Yee
  • Campus Address: 2214 SES

Title: Hydrodynamic fluctuations and lower bounds of the transport coefficients

Abstract: 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.

HEP Oct31 Martinez Guerrero flyer