ar X iv : g r - qc / 9 51 10 65 v 1 2 4 N ov 1 99 5 Particle Creation in the Bell - Szekeres Spacetime Alexander Feinstein and Miguel Angel

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 ∗

ar X iv : g r - qc / 9 51 10 66 v 1 2 4 N ov 1 99 5 Scalar Field Inhomogeneous

Some exact solutions for the Einstein field equations corresponding to inhomogeneous G 2 cosmologies with an exponential-potential scalar field which generalize solutions obtained previously are considered. Several particular cases are studied and the properties related to generalized inflation and asymptotic behaviour of the models are discussed.

ar X iv : g r - qc / 9 31 10 23 v 1 1 4 N ov 1 99 3 Tunnelling geometries II . Reduction methods for functional determinants

The reduction algorithms for functional determinants of differential operators on spacetime manifolds of different topological types are presented, which were recently used for the calculation of the no-boundary wavefunction and the partition function of tunnelling geometries in quantum gravity and cosmology. PACS numbers: 04.60.+n, 03.70.+k, 98.80.Hw

ar X iv : h ep - t h / 99 11 02 7 v 1 4 N ov 1 99 9 Holography and the Future Tube

The Future Tube T + n of n-dimensional Minkowski spacetime may be identified with the reduced phase space P , or " space of motions " of a particle moving in (n + 1)-dimensional Anti-de-Sitter Spacetime. Both are isomorphic to a homogeneous bounded domain in C n whose Shilov boundary may be identified with n-dimensional conformally compactified Minkowski spacetime.

ar X iv : g r - qc / 0 51 11 56 v 1 2 9 N ov 2 00 5 Adiabatic Particle Production with Decaying Λ and Anisotropic Universe

The inclusion of cosmological constant into Einstein field equation was done primarily by Einstein himself with a view to model a static universe. Later he discarded the cosmological constant (and commented [1] “...... the biggest blunder of my life”), on the basis of the observational data supporting the expansion of the universe. Subsequently, it was reintroduced and then omitted to match wit...