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GR: Fachverband Gravitation und Relativitätstheorie
GR 1: Schwarze Löcher I
GR 1.3: Talk
Monday, February 25, 2013, 14:30–14:45, HS 6
Black holes, classicalization, dimensional reduction and holography — •Piero Nicolini1, Jonas Mureika2, and Euro Spallucci3 — 1Goethe University Frankfurt — 2Loyola Marymount University, Los Angeles — 3University of Trieste
In this contribution we address two issues related to the black hole classicalization (also known as gravity self completeness) i.e., the recently conjectured black hole semi-classical regime one obtains by compressing particles at transplanckian energies.
We showed that the supposed mechanism of space-time spontaneous dimensional reduction - one experiences by probing the space-time at energies close to the Planck scale - might be in conflict with the expected gravity self completeness. Specifically for (1+1)-dimensional dilaton gravity models black hole formation can occur with no mass lower bound.
In the second part of the talk, we present a new static, neutral, non-rotating black hole metric, admitting an extremal configuration with both mass and radius equalling the Planck units. We identify this object as the space-time fundamental building block, whose interior is physically inaccessible and cannot be probed even during the Hawking evaporation terminal phase. This metric overcomes the difficulties presented in the first part of the talk. Thermodynamics and holographic considerations are presented as a conclusion of the contribution.