Conjecture on the Avoidance of the Big Crunch

Details Conjecture on the Avoidance of the Big Crunch Conjecture on the Avoidance of the Big Crunch

2005-06-26

arxiv.org/abs/hep-th/0506218v1

Chin.Phys.Lett.23:3388-3390,2006

Physics

High Energy Physics

High Energy Physics - Theory

6 pages

Scientific paper

10.1088/0256-307X/23/12/074

KKLT give a mechanism to generate de Sitter vacua in string theory. And recently, the scenario, {\em landscape}, is suggested to explain the problem of the cosmological constant. In this scenario, the cosmological constant is a de Sitter vacuum. The vacuum is metastable and would decay into an anti-de Sitter vacuum finally. Then the catastrophe of the big crunch appears. In this paper by conjecturing the physics at the Planck scale, we modify the definition of the Hawking temperature. Hinted by this modification, we modify the Friedmann equation. we find that this avoid the singularity and gives a bouncing cosmological model.

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