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Title: Evolution of entanglement entropy in the early universe

We investigate the entropy evolution in the early universe by computing the change of the entanglement entropy in Freedmann-Robertson-Walker quantum cosmology in the presence of particle horizon. The matter is modeled by a Chaplygin gas so as to provide a smooth interpolation between inflationary and radiation epochs, rendering the evolution of entropy from early time to late time trackable. We found that soon after the onset of the inflation, the total entanglement entropy rapidly decreases to a minimum. It then rises monotonically in the remainder of the inflation epoch as well as the radiation epoch. Our result is in qualitative agreement with the area law of Ryu and Takayanagi including the logarithmic correction. We comment on the possible implication of our finding to the cosmological entropy problem.
Authors:
;  [1] ;  [2]
  1. Department of Physics, National Taiwan University, Taipei, 10617 Taiwan (China)
  2. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, 02139 (United States)
Publication Date:
OSTI Identifier:
22370683
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 02; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CORRECTIONS; ENTROPY; EVOLUTION; INTERPOLATION; MATTER; QUANTUM COSMOLOGY; QUANTUM ENTANGLEMENT; UNIVERSE COSMOLOGICAL INFLATION