Unstable growth of curvature perturbations in nonsingular bouncing cosmologies.

@article{Xue2010UnstableGO,
  title={Unstable growth of curvature perturbations in nonsingular bouncing cosmologies.},
  author={BingKan Xue and Paul J. Steinhardt},
  journal={Physical review letters},
  year={2010},
  volume={105 26},
  pages={261301}
}
Bouncing cosmologies require an ekpyrotic contracting phase (w≫1) in order to achieve flatness, homogeneity, and isotropy. Models with a nonsingular bounce further require a bouncing phase that violates the null energy condition (w<-1). We show that the transition from the ekpyrotic phase to the bouncing phase creates problems for cosmological perturbations. A component of the adiabatic curvature perturbations, though decaying and negligible during the ekpyrotic phase, is exponentially… CONTINUE READING

From This Paper

Figures, tables, and topics from this paper.

References

Publications referenced by this paper.
Showing 1-4 of 4 references

Phys

  • C. Gordon, D. Wands, B. A. Bassett, R. Maartens
  • Rev. D 63, 023506 (2001) [arXiv:astroph/0009131…
  • 2008

Jcap 0711

  • P. Creminelli, L. Senatore
  • 010
  • 2007
2 Excerpts

Jhep 0612

  • P. Creminelli, M. A. Luty, A. Nicolis, L. Senatore
  • 080
  • 2006
2 Excerpts

Jhep 0405

  • N. Arkani-Hamed, H. C. Cheng, M. A. Luty, S. Mukohyama
  • 074
  • 2004
2 Excerpts

Similar Papers

Loading similar papers…