  Entanglement entropy is a useful probe of compressible quantum matter because
it can detect the existence of Fermi surfaces, both of microscopic fermionic
degrees of freedom and of "hidden" gauge charged fermions. Much recent
attention has focused on holographic efforts to model strongly interacting
compressible matter of interest for condensed matter physics. We complete the
entanglement analysis initiated in Huijse {\em et al.}, Phys. Rev. B 85, 035121
(2012) (arXiv:1112.0573) and Ogawa {\em et al.}, JHEP 1, 125 (2012)
(arXiv:1111.1023) using the recent proposal of Faulkner {\em et al.}
(arXiv:1307.2892) to analyze the entanglement entropy of the visible fermions
which arises from bulk loop corrections. We find perfect agreement between
holographic and field theoretic calculations.
