Instability of fermionic, vectorial, and tensorial fields in curved spacetimes
Applications of the theory of self-adjoint extensions in Quantum Gravity
Vacuum awakening: restabilization and its relation with spontaneous scalarization
| Full text | |
| Author(s): |
Total Authors: 3
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| Affiliation: | [1] Univ Calif Davis, Dept Phys, Davis, CA 95616 - USA
[2] Univ Estadual Campinas, Inst Matemat Estat & Comp Cient, BR-13083859 Campinas, SP - Brazil
Total Affiliations: 2
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| Document type: | Journal article |
| Source: | Physical Review Letters; v. 107, n. 2, p. 21303, 2011. |
| Web of Science Citations: | 28 |
| Abstract | |
We show that vacuum fluctuations of the stress-energy tensor in two-dimensional dilaton gravity lead to a sharp focusing of light cones near the Planck scale, effectively breaking space up into a large number of causally disconnected regions. This phenomenon, called "asymptotic silence" when it occurs in cosmology, might help explain several puzzling features of quantum gravity, including evidence of spontaneous dimensional reduction at short distances. While our analysis focuses on a simplified two-dimensional model, we argue that the qualitative features should still be present in four dimensions. (AU) | |
| FAPESP's process: | 08/01310-5 - Quantum singularities |
| Grantee: | João Paulo Pitelli Manoel |
| Support Opportunities: | Scholarships in Brazil - Doctorate |