ar X iv : g r - qc / 9 70 60 59 v 3 1 6 Ju l 1 99 8 Foundation of The Two dimensional Quantum Theory of Gravity

ar X iv : g r - qc / 9 80 70 56 v 1 2 1 Ju l 1 99 8 NOVEL INSTABILITY IN SUPERSTRING COSMOLOGY

As a most promising candidate for quantum theory of the gravity, the superstring theory has attracted many researchers including cosmologists. It is expected that the cosmological initial singularity is avoided within the context of the superstring theory. Indeed, Antoniadis et. al. found an interesting example of the the nonsingular cosmological solutions by considering the string one-loop cor...

ar X iv : g r - qc / 9 31 20 09 v 1 3 D ec 1 99 3 UTTG - 32 - 93 December 1993 On Black Hole Singularities in Quantum Gravity ⋆ Jorge

We show that absence of space-like boundaries in 1+1 dimensional dilaton gravity implies a catastrophic event at the end point of black hole evaporation. The proof is completely independent of the physics at Planck scales, which suggests that the same will occur in any theory of quantum gravity which only admits trivial space-time topologies. PACS Categories: 04.60+.n, 12.25.+e, 97.60.Lf ⋆ Work...

ar X iv : g r - qc / 9 70 30 85 v 1 2 8 M ar 1 99 7 Gravity Quantized ( the high tension string )

A candidate theory of gravity quantized is reviewed.

ar X iv : g r - qc / 9 80 70 27 v 1 1 1 Ju l 1 99 8 Higher - dimensional geometric σ - models

Geometric σ-models have been defined as purely geometric theories of scalar fields coupled to gravity. By construction, these theories possess arbitrarily chosen vacuum solutions. Using this fact, one can build a Kaluza–Klein geometric σ-model by specifying the vacuum metric of the form M 4 × B d. The obtained higher dimensional theory has vanishing cosmological constant but fails to give massl...

ar X iv : g r - qc / 9 51 10 48 v 1 1 6 N ov 1 99 5 Two lectures on Two - Dimensional Gravity ∗