| Texto completo | |
| Autor(es): |
Número total de Autores: 3
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| Afiliação do(s) autor(es): | [1] Univ Calif Davis, Dept Phys, Davis, CA 95616 - USA
[2] Univ Estadual Campinas, Inst Matemat Estat & Comp Cient, BR-13083859 Campinas, SP - Brazil
Número total de Afiliações: 2
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| Tipo de documento: | Artigo Científico |
| Fonte: | Physical Review Letters; v. 107, n. 2, p. 21303, 2011. |
| Citações Web of Science: | 28 |
| Resumo | |
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) | |
| Processo FAPESP: | 08/01310-5 - Singularidades quânticas |
| Beneficiário: | João Paulo Pitelli Manoel |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |