Is entanglement entropy proportional to area?

Details Is entanglement entropy proportional to area? Is entanglement entropy proportional to area?

2005-07-23

arxiv.org/abs/hep-th/0507228v2

Can.J.Phys.84:493-499,2006

Physics

High Energy Physics

High Energy Physics - Theory

6 pages. Based on talk by S. Das at Theory Canada 1, Vancouver, 3 June, 2005. To be published in a special edition of the Cana

Scientific paper

10.1139/P06-002

It is known that the entanglement entropy of a scalar field, found by tracing over its degrees of freedom inside a sphere of radius ${\cal R}$, is proportional to the area of the sphere (and not its volume). This suggests that the origin of black hole entropy, also proportional to its horizon area, may lie in the entanglement between the degrees of freedom inside and outside the horizon. We examine this proposal carefully by including excited states, to check probable deviations from the area law.

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