Bounce in GR and higher-order derivative operators
General Relativity and Quantum Cosmology
2019-10-18 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
Recent progress seems to suggest that one must modify General Relativity (GR) to stably violate the null energy condition and avoid the cosmological singularity. However, with the higher-order derivative operators of scalar field (a subclass of the degenerate higher-order scalar-tensor theory), we show that at energies well below the Planck scale, fully stable nonsingular cosmologies can actually be implemented within GR.
Cite
@article{arxiv.1901.08283,
title = {Bounce in GR and higher-order derivative operators},
author = {Gen Ye and Yun-Song Piao},
journal= {arXiv preprint arXiv:1901.08283},
year = {2019}
}
Comments
3 figures, matched published version in PhysRevD