Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2008-08-05
Physics
Nuclear Physics
Nuclear Theory
12 pages; to appear in the proceedings of the 8th Conference on Continuous Advances in QCD, Minneapolis, Minnesota, May 15-18,
Scientific paper
We summarize recent results regarding the equilibrium and non-equilibrium behavior of cold dilute atomic gases in the limit in which the two body scattering length a goes to infinity. In this limit the system is described by a Galilean invariant (non-relativistic) conformal field theory. We discuss the low energy effective lagrangian appropriate to the limit a->infinity, and compute low energy coefficients using an epsilon-expansion. We also show how to combine the effective lagrangian with kinetic theory in order to compute the shear viscosity, and compare the kinetic theory predictions to experimental results extracted from the damping of collective modes in trapped Fermi gases.
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