https://doi.org/10.1140/epjp/i2015-15154-9
Regular Article
Entanglement entropy due to near-horizon degrees of freedom
Department of Theoretical Sciences, S N Bose National Centre for Basic Sciences, 700098, Kolkata, India
* e-mail: suman.ghosh@bose.res.in
Received:
11
May
2015
Revised:
6
June
2015
Accepted:
8
July
2015
Published online:
30
July
2015
Assuming that the dominant contribution to the entropy due to entanglement across a spherical hypersurface comes from the near-horizon degrees of freedom, we analytically derive the entropy of a free massless scalar field in Minkowski spacetime across a spherical entangling surface. The resulting entanglement entropy is found to be proportional to the entangling surface as expected. A logarithmic subleading term with positive coefficient is also found through numerical computation. We have extended the analysis to higher dimensions as well.
© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg, 2015
