ar X iv : g r - qc / 0 60 70 44 v 1 1 1 Ju l 2 00 6 Instabilities in numerical loop quantum cosmology

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...

X iv : g r - qc / 0 10 70 84 v 1 2 6 Ju l 2 00 1 Frequency - dependent rigidity in large - scale interferometric gravitational - wave detectors

Electromagnetic rigidity which exists in large-scale optical resonators if pumping frequency is detuned from the eigenfrequency of resonator have sophisticated spectral dependence which allows to obtain sensitivity better than the Standard Quantum Limits both for the free test mass and the harmonic oscillator.

ar X iv : m at h - ph / 0 60 70 40 v 1 2 0 Ju l 2 00 6 Invariant Form of BK - factorization and its Applications

ar X iv : g r - qc / 0 30 70 78 v 1 1 6 Ju l 2 00 3 3 D gravity with torsion as a Chern - Simons gauge theory

We show that topological 3D gravity with torsion can be formulated as a Chern-Simons gauge theory, provided a specific parameter, known as the effective cosmological constant, is negative. In that case, the boundary dynamics of the theory corresponding to anti-de Sitter boundary conditions is described by a conformal field theory with two different central charges.

ar X iv : g r - qc / 0 60 71 02 v 1 2 4 Ju l 2 00 6 ENERGY MOMENTUM LOCALIZATION IN MARDERSPACE TIME

and Weinberg's definitions in general rela-tivity, we find the momentum four-vector of the closed universe based on Marder space-time. The momentum four-vector (due to matter plus field) is found to be zero. These results supports the viewpoints of Banerjee-Sen, Xulu and Aydo ˙ gdu-Saltı. Another point is that our study agree with previous works of Cooperstock-Israelit, Rosen, Johri et al..