Description
Quantum critical points are believed to underlie the exotic
properties of heavy fermion compounds and other materials
including high Tc superconductors. They are characterized by
a non-relativistic `Lifshitz' scaling symmetry that has been
shown to emerge in many systems with holographic duals,
including holographic superconductors, `electron' stars and
disordered systems. When temperature is introduced a large
region of the phase diagram of these systems is dominated by
the physics of the quantum critical point. At long
wavelengths one can use an effective hydrodynamic
description. I discuss the properties and novel transport
phenomena that appear in Lifshitz fluids and superfluids
from the point of view of effective field theories and
holographic models.
