Abstract
The thermodynamic and transport properties of the unitary Fermi gas at finite temperature are governed by a quantum critical point at and zero density. We compute the universal shear viscosity to entropy ratio in the high-temperature quantum critical regime and find that this strongly coupled quantum fluid comes close to perfect fluidity . Using a controlled large- expansion, we show that already at the first nontrivial order the equation of state and the Tan contact density agree well with the most recent experimental measurements and theoretical Luttinger-Ward and bold diagrammatic Monte Carlo calculations.
- Received 5 April 2012
DOI:https://doi.org/10.1103/PhysRevA.86.013616
©2012 American Physical Society