55 research outputs found
Black Hole Emission Rates and the AdS/CFT Correspondence
We study the emission rates of scalar, spinor and vector particles from a 5
dimensional black hole for arbitrary partial waves. The solution is lifted to 6
dimensions, and the near horizon geometry of the black hole
solution is probed to determine the greybody factors. We show that the exact
decay rates can be reproduced from a -dimensional conformal field theory
which lies on the boundary of the near horizon geometry. The AdS/CFT
correspondence is used to determine the dimension of the CFT operators
corresponding to the bulk fields. These operators couple to plane waves
incident on the CFT from infinity to produce emission in the bulk.Comment: 37 pages, minor modifications; to be published in JHE
Semiclassical Loop Quantum Gravity and Black Hole Thermodynamics
In this article we explore the origin of black hole thermodynamics using
semiclassical states in loop quantum gravity. We re-examine the case of entropy
using a density matrix for a coherent state and describe correlations across
the horizon due to SU(2) intertwiners. We further show that Hawking radiation
is a consequence of a non-Hermitian term in the evolution operator, which is
necessary for entropy production or depletion at the horizon. This non-unitary
evolution is also rooted in formulations of irreversible physics
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