Holographic entanglement entropy for massive flavours in dS 4

We examine the holographic entanglement entropy of spherical regions in de sitter space in the presence of massive flavour fields which are modelled by probe d7 branes in ads 5 × s 5. we focus on the finite part of the massive correction to the entropy in the limits of small mass and large mass that are separated by a phase transition between two topologically distinct brane embeddings. for small masses, it approaches the flat space result for small spheres, whereas for large spheres there is a term that goes as the log of the sphere radius. for large masses, we find evidence for a universal contribution logarithmic in the mass. in all cases the entanglement entropy is smooth as the sphere radius crosses the horizon.