Conformal structure of the Schwarzschild black hole

Details Conformal structure of the Schwarzschild black hole Conformal structure of the Schwarzschild black hole

2011-06-06

arxiv.org/abs/1106.0999v3

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, uses JHEP3.cls. v2: Minor correction in appendix. v3: Final version to appear in PRD

Scientific paper

We show that the scalar wave equation at low frequencies in the Schwarzschild geometry enjoys a hidden SL(2,R) invariance, which is not inherited from an underlying symmetry of the spacetime itself. Contrary to what happens for Kerr black holes, the vector fields generating the SL(2,R) are globally defined. Furthermore, it turns out that under an SU(2,1) Kinnersley transformation, which maps the Schwarzschild solution into the near horizon limit AdS_2 x S^2 of the extremal Reissner-Nordstr"om black hole (with the same entropy), the Schwarzschild hidden symmetry generators become exactly the isometries of the AdS_2 factor. Finally, we use the SL(2,R) symmetry to determine algebraically the quasinormal frequencies of the Schwarzschild black hole, and show that this yields the correct leading behaviour for large damping.

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