Quest for Perfection:
The neck and neck race continues

Following shortly after my previous journal entry on recent progress in tightening the upper bound on the shear viscosity-to-entropy density ratio (η/s) of the quark-gluon plasma, the competition has struck back. In a letter appearing in Science today

Cao et al. report results from new precision measurements of the η/s ratio in an ultracold gas of trapped fermionic 6Li atoms in the universal regime as a function of temperature. (more…)

What a Difference a Term Makes

The recent post on the AMO competition for perfect fluidity offers a wonderful opportunity to compare and contrast the techniques of condensed matter physics versus those of relativistic heavy ion physics. (more…)

The Quest for the Ideal Fluid: Competition from Li-Atoms

In April of 2005 Brookhaven National Laboratory announced that scientists at RHIC had created the most ideal liquid ever observed in nature. Now, 3 years later, RHIC is facing competition to this claim from strongly interacting ultra-cold Fermi gases. (more…)