Journal article

Brane holes

Frolov V, Mukohyama S ...see all

Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 83, issue 4 (2011)

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Abstract

The aim of this paper is to demonstrate that in models with large extra dimensions under special conditions one can extract information from the interior of 4D black holes. For this purpose we study an induced geometry on a test brane in the background of a higher dimensional static black string or a black brane. We show that at the intersection surface of the test brane and the bulk black string/brane the induced metric has an event horizon, so that the test brane contains a black hole. We call it a brane hole. When the test brane moves with a constant velocity V with respect to the bulk black object it also has a brane hole, but its gravitational radius re is greater than the size of the bulk black string/brane r0 by the factor (1-V 2) -1. We show that bulk `photon' emitted in the region between r0 and re can meet the test brane again at a point outside re. From the point of view of observers on the test brane the events of emission and capture of the bulk `photon' are connected by a spacelike curve in the induced geometry. This shows an example in which extra dimensions can be used to extract information from the interior of a lower dimensional black object. Instead of the bulk black string/brane, one can also consider a bulk geometry without horizon. We show that nevertheless the induced geometry on the moving test brane can include a brane hole. In such a case the extra dimensions can be used to extract information from the complete region of the brane hole interior. We discuss thermodynamic properties of brane holes and interesting questions which arise when such an extra dimensional channel for the information mining exists.

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Authors

  • Valeri P. Frolov

  • Shinji Mukohyama

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