Abstract
Several properties of canonical quantum gravity modify spacetime structures, sometimes to the degree that no effective line elements exist to describe the geometry. An analysis of solutions, for instance in the context of black holes, then requires new insights. In this paper, standard definitions of horizons in spherical symmetry are first reformulated canonically, and then evaluated for solutions of equations and constraints modified by inverse-triad corrections of loop quantum gravity. When possible, a spacetime analysis is performed which reveals a mass threshold for black holes and small changes to Hawking radiation. For more general conclusions, canonical perturbation theory is developed to second order to include back-reaction from matter. The results shed light on the questions of whether renormalization of Newton's constant or other modifications of horizon conditions should be taken into account in computations of black-hole entropy in loop quantum gravity.
| Original language | English (US) |
|---|---|
| Article number | 185006 |
| Journal | Classical and Quantum Gravity |
| Volume | 28 |
| Issue number | 18 |
| DOIs | |
| State | Published - Sep 21 2011 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)
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Black-hole horizons in modified spacetime structures arising from canonical quantum gravity. / Bojowald, Martin; Paily, George M.; Reyes, Juan D.; Tibrewala, Rakesh.
In: Classical and Quantum Gravity, Vol. 28, No. 18, 185006, 21.09.2011.Research output: Contribution to journal › Article
TY - JOUR
T1 - Black-hole horizons in modified spacetime structures arising from canonical quantum gravity
AU - Bojowald, Martin
AU - Paily, George M.
AU - Reyes, Juan D.
AU - Tibrewala, Rakesh
PY - 2011/9/21
Y1 - 2011/9/21
N2 - Several properties of canonical quantum gravity modify spacetime structures, sometimes to the degree that no effective line elements exist to describe the geometry. An analysis of solutions, for instance in the context of black holes, then requires new insights. In this paper, standard definitions of horizons in spherical symmetry are first reformulated canonically, and then evaluated for solutions of equations and constraints modified by inverse-triad corrections of loop quantum gravity. When possible, a spacetime analysis is performed which reveals a mass threshold for black holes and small changes to Hawking radiation. For more general conclusions, canonical perturbation theory is developed to second order to include back-reaction from matter. The results shed light on the questions of whether renormalization of Newton's constant or other modifications of horizon conditions should be taken into account in computations of black-hole entropy in loop quantum gravity.
AB - Several properties of canonical quantum gravity modify spacetime structures, sometimes to the degree that no effective line elements exist to describe the geometry. An analysis of solutions, for instance in the context of black holes, then requires new insights. In this paper, standard definitions of horizons in spherical symmetry are first reformulated canonically, and then evaluated for solutions of equations and constraints modified by inverse-triad corrections of loop quantum gravity. When possible, a spacetime analysis is performed which reveals a mass threshold for black holes and small changes to Hawking radiation. For more general conclusions, canonical perturbation theory is developed to second order to include back-reaction from matter. The results shed light on the questions of whether renormalization of Newton's constant or other modifications of horizon conditions should be taken into account in computations of black-hole entropy in loop quantum gravity.
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UR - http://www.scopus.com/inward/citedby.url?scp=80052982370&partnerID=8YFLogxK
U2 - 10.1088/0264-9381/28/18/185006
DO - 10.1088/0264-9381/28/18/185006
M3 - Article
AN - SCOPUS:80052982370
VL - 28
JO - Classical and Quantum Gravity
JF - Classical and Quantum Gravity
SN - 0264-9381
IS - 18
M1 - 185006
ER -