Singularity resolution in cosmologies using AdS/CFT

7th International Conference on Gravitation and Cosmology

Ghosh, A.^1

Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506, United States^1

关键词: Big Crunch;    Black holes;    Field theory;    General Relativity;    Quantum gravity;    Quantum theory of gravity;    Theory of gravity;    Thermal distributions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/484/1/012056/pdf
DOI  :  10.1088/1742-6596/484/1/012056

来源: IOP

【 摘 要 】

Singularities in general relativity are expected to be cured by a quantum theory of gravity. String theory is a prospective candidate for quantum gravity and holographic correspondences like AdS/CFT, that arise from string theory, might shed some light into the nature of singularities. While the theory of gravity might not be tractable near the singularity, the corresponding field theory might be well-behaved. We have come up with a model of cosmology, where curvatures become large at some time, thus, resembling a big crunch, but whose field theory dual remains well-behaved. Our analysis in the field theory indicates that we have a bouncing cosmology with a thermal distribution of radiation, and a possible formation of a small black hole after the bounce.