  We describe the lowest Landau level of a quantum electron star in AdS4. In
the presence of a suitably strong magnetic field, the dynamics of fermions in
the bulk is effectively reduced from four to two dimensions. These
two-dimensional fermions can subsequently be treated using the techniques of
bosonization and the difficult many-body problem of building a gravitating,
charged quantum star is reduced to solving the sine-Gordon model coupled to a
gauge field and a metric. The kinks of the sine-Gordon model provide the
holographic dual of the lowest Landau levels of the strongly-coupled d=2+1
dimensional boundary field theory. The system exhibits order one oscillations
in the magnetic susceptibility, now arising as a classical effect in the bulk.
Moreover, as the chemical potential is varied, we find jumps in the charge
density, oscillations in the fractionalised charge density and plateaux in the
cohesive charge density
