Tachyon field in loop quantum cosmology: An example of traversable singularity
Abstract
Loop quantum cosmology (LQC) predicts a nonsingular evolution of the universe through a bounce in the high energy region. But LQC has an ambiguity about the quantization scheme. Recently, the authors in [Phys. Rev. D 77, 124008 (2008)] proposed a new quantization scheme. Similar to others, this new quantization scheme also replaces the big bang singularity with the quantum bounce. More interestingly, it introduces a quantum singularity, which is traversable. We investigate this novel dynamics quantitatively with a tachyon scalar field, which gives us a concrete example. Our result shows that our universe can evolve through the quantum singularity regularly, which is different from the classical big bang singularity. So this singularity is only a week singularity.
Cite
@article{arxiv.0812.3552,
title = {Tachyon field in loop quantum cosmology: An example of traversable singularity},
author = {Li-Fang Li and Jian-Yang Zhu},
journal= {arXiv preprint arXiv:0812.3552},
year = {2014}
}
Comments
7 pages, 3 figures. Accepted for publication in Physical Review D