Signatures of an Emergent Gravity from Black Hole Entropy
arXiv:0905.3053 · doi:10.1007/s10714-009-0848-0
Abstract
The existence of a thermodynamic description of horizons indicates that spacetime has a microstructure. While the "fundamental" degrees of freedom remain elusive, quantizing Einstein's gravity provides some clues about their properties. A quantum AdS black hole possesses an equispaced mass spectrum, independent of Newton's constant, , when its horizon radius is large compared to the AdS length. Moreover, the black hole's thermodynamics in this limit is inextricably connected with its thermodynamics in the opposite (Schwarzschild) limit by a duality of the Bose partition function. , absent in the mass spectrum, reemerges in the thermodynamic description through the Schwarzschild limit, which should be viewed as a natural "ground state". It seems that the Hawking-Page phase transition separates fundamental, "particle-like" degrees of freedom from effective, "geometric" ones.
arXiv commentFifth prize at the 2009 Gravity Research Foundation Awards for Essays on Gravitation. 5 pages, no figures
References in corpus (27)
- Large N Field Theories, String Theory and Gravity
- Microscopic Origin of the Bekenstein-Hawking Entropy
- Thermodynamics of Spacetime: The Einstein Equation of State
- Quantum Geometry and Black Hole Entropy
- Black hole entropy in Loop Quantum Gravity
- Black Hole Entropy from Loop Quantum Gravity
- A Correspondence Principle for Black Holes and Strings
- Gravity and the Thermodynamics of Horizons
- Black hole entropy from Quantum Geometry
- Geometrodynamics of Schwarzschild Black Holes
- Exact Counting of Black Hole Microstates
- AdS/CFT Duals of Topological Black Holes and the Entropy of Zero-Energy States
- DeSitter entropy, quantum entanglement and ADS/CFT
- Spherically Symmetric Gravity as a Completely Integrable System
- Black hole state counting in Loop Quantum Gravity: A number theoretical approach
- Logarithmic Corrections to Black Hole Entropy and AdS/CFT Correspondence
- Black hole entropy quantization
- Statistical Entropy and AdS/CFT Correspondence in BTZ Black Holes
- Classical and quantum LTB model for the non-marginal case
- Toward a Midisuperspace Quantization of LeMaitre-Tolman-Bondi Collapse Models
- Mass Spectrum and Statistical Entropy of the BTZ black hole from Canonical Quantum Gravity
- Gravity as an emergent phenomenon: A conceptual description
- Quantum general relativity and Hawking radiation
- Universal near-horizon conformal structure and black hole entropy
- Classical and Quantum Gravitational Collapse in d-dim AdS Spacetime I. Classical Solutions
- Spectrum and Statistical Entropy of AdS Black Holes
- Classical and Quantum Gravitational Collapse in d-dim AdS Spacetime II. Quantum States and Hawking Radiation