Speaker
Petter Säterskog
Description
We study the strongly coupled theory of a Fermi surface in
2+1 dimensions coupled to a massless scalar in a general
limit in which fermionic loops are suppressed such as a
matrix large $N$ limit or a vector small $N_f$ limit. The
case where the Fermi velocity equals the boson velocity
gives extra symmetry to the low energy limit of all diagrams
which allows us to make general statements about the full
fermion two-point function. We find that these theories
generally have a non-monotonic dispersion across the Fermi
surface resulting in splitting of the Fermi surface.
