"Scale Invariance in Atomic Physics: from Efimov states
to Fermions at Unitarity"
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The talk will provide an introduction to two
examples in ultracold atom physics where
scale invariance plays an important role:
three-body Efimov states of bosonic atoms
and Fermions at infinite scattering length.
We discuss the issue of an apparently 'universal'
three-body parameter in the Efimov context
and both thermodynamics and transport properties
of the unitary Fermi gas.