  We consider a spherical region with a heavy quark in the middle. We compute
the extra entanglement entropy due to the presence of a heavy quark both in
${\cal N}=4 $ Super Yang Mills and in the ${\cal N}=6$ Chern-Simons matter
theory (ABJM). This is done by relating the computation to the expectation
value of a circular Wilson loop and a stress tensor insertion. We also give an
exact expression for the Bremsstrahlung function that determines the energy
radiated by a quark in the ABJM theory.
