Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2004-05-06
Phys.Rev. D70 (2004) 106005
Physics
High Energy Physics
High Energy Physics - Theory
40 pages, LaTeX, 3 eps figures, v2: references added
Scientific paper
10.1103/PhysRevD.70.106005
We show that scalar perturbations of the eternal, rotating BTZ black hole should lead to an instability of the inner (Cauchy) horizon, preserving strong cosmic censorship. Because of backscattering from the geometry, plane wave modes have a divergent stress tensor at the event horizon, but suitable wavepackets avoid this difficulty, and are dominated at late times by quasinormal behavior. The wavepackets have cuts in the complexified coordinate plane that are controlled by requirements of continuity, single-valuedness and positive energy. Due to a focusing effect, regular wavepackets nevertheless have a divergent stress-energy at the inner horizon, signaling an instability. This instability, which is localized behind the event horizon, is detected holographically as a breakdown in the semiclassical computation of dual CFT expectation values in which the analytic behavior of wavepackets in the complexified coordinate plane plays an integral role. In the dual field theory, this is interpreted as an encoding of physics behind the horizon in the entanglement between otherwise independent CFTs.
Balasubramanian Vijay
Levi Thomas S.
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