Quasinormal modes prefer supersymmetry ?
| Autor: | Yi Ling, Hong-bao Zhang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
Physics
High Energy Physics - Theory Nuclear and High Energy Physics Supergravity Immirzi parameter FOS: Physical sciences Semiclassical physics General Relativity and Quantum Cosmology (gr-qc) Supersymmetry Loop quantum gravity General Relativity and Quantum Cosmology Theoretical physics High Energy Physics - Theory (hep-th) Quantum mechanics Extremal black hole Quasinormal mode Black hole thermodynamics |
| Popis: | One ambiguity in loop quantum gravity is the appearance of a free parameter which is called Immirzi parameter. Recently Dreyer has argued that this parameter may be fixed by considering the quasinormal mode spectrum of black holes, while at the price of changing the gauge group to SO(3) rather than the original one SU(2). Physically such a replacement is not quite natural or desirable. In this paper we study the relationship between the black hole entropy and the quasi normal mode spectrum in the loop quantization of N=1 supergravity. We find that a single value of the Immirzi parameter agrees with the semiclassical expectations as well. But in this case the lowest supersymmetric representation dominates, fitting well with the result based on statistical consideration. This suggests that, so long as fermions are included in the theory, supersymemtry may be favored for the consistency of the low energy limit of loop quantum gravity. 3 pages |
| Databáze: | OpenAIRE |
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