ar X iv : g r - qc / 0 30 71 10 v 1 2 5 Ju l 2 00 3 A WORMHOLE - GENERATED PHYSICAL UNIVERSE WITH REFINED APPROXIMATION ∗
نویسنده
چکیده
We improved the approximation of the model of the wormhole generated physical universe constructed by Choudhury and Pendharkar. We show here that the negative pressure of the unphysical wormhole can generate the right physical condition to explain the correct sign of the deacceleration parameter q0. The negative sign of q0 implies an accelerating universe.
منابع مشابه
ar X iv : g r - qc / 0 40 51 35 v 1 2 7 M ay 2 00 4 WORMHOLE CORE , EXTRA DIMENSIONS , AND PHYSICAL UNIVERSE ∗ †
We created a model of a several dimensional physical universe. The extra dimensions associated with the four dimensional physical universe is assumed to have a modified Gidding-Strominger wormhole core. This core is separated by a flexible wall, but it allows the adiabatic pressure generated in the wormhole to penetrate in the extra dimensions. We assume that the extra dimensions are a contract...
متن کاملar X iv : g r - qc / 0 50 30 05 v 1 1 M ar 2 00 5 Dark energy , wormholes , and the Big Rip
The time evolution of a wormhole in a Friedmann universe approaching the Big Rip is studied. The wormhole is modeled by a thin spherical shell accreting the superquintessence fluid – two different models are presented. Contrary to recent claims that the wormhole overtakes the expansion of the universe and engulfs it before the Big Rip is reached, it is found that the wormhole becomes asymptotic...
متن کاملar X iv : g r - qc / 0 31 20 38 v 2 2 0 Ju l 2 00 4 Strings and Branes under Microscope
It is shown that in the standard vacuum 5D Kaluza-Klein gravity there is wormhole-like solutions which look like strings attached to two D-branes. The asymptotical behaviour of the corresponding metric is investigated.
متن کاملar X iv : g r - qc / 0 31 10 43 v 1 1 3 N ov 2 00 3 Influence On The Physical Universe By Wormhole Generated Extra Dimensional Space ∗
We use the Gu-Huang model for a special case when the universe is seven dimensional. In the core of the extra dimension we place a modified Gidding-Strominger wormhole. This wormhole is separated by a thin wall from the extra dimensional space. The wormhole content is assumed to satisfy the adiabatic gas law. The wormhole pressure penetrates into the extra dimension. We then solve the Einstein ...
متن کاملar X iv : g r - qc / 0 60 71 02 v 2 1 7 Ju l 2 00 7 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..
متن کامل