Abstract
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.
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Vaganov, V. Holographic entanglement entropy for massive flavours in dS 4 . J. High Energ. Phys. 2016, 172 (2016). https://doi.org/10.1007/JHEP03(2016)172
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DOI: https://doi.org/10.1007/JHEP03(2016)172