Journal
PHYSICAL REVIEW A
Volume 87, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.87.023629
Keywords
-
Categories
Funding
- US Department of Energy [DE-FG02-03ER41260]
- U.S. Department of Energy (DOE) [DE-FG02-03ER41260] Funding Source: U.S. Department of Energy (DOE)
Ask authors/readers for more resources
We study hydrodynamic fluctuations in a nonrelativistic fluid. We show that in three dimensions, fluctuations lead to a minimum in the shear viscosity to entropy density ratio n/s as a function of the temperature. The minimum provides a bound n/s which is independent of the conjectured bound in string theory, n/s >= (h) over bar/(4 pi k(B)), where s is the entropy density. For the dilute Fermi gas at unitarity, we find n/s >= 0.2 (h) over bar. This bound is not universal-it depends on the thermodynamic properties of the unitary Fermi gas and on empirical information about the range of validity of hydrodynamics. We also find that the viscous relaxation time of a hydrodynamic mode with frequency omega diverges as 1/root omega, and that the shear viscosity in two dimensions diverges as 1n(1/omega). DOI: 10.1103/PhysRevA. 87.023629
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available