Abstract
We probe the pure Einstein gravity contributions to the second-order density power spectrum. On the small scale, we discover that Einstein’s gravity contribution is negligibly small. This guarantees that Newton’s gravity is currently sufficient to handle the baryon acoustic oscillation scale. On the large scale, however, we discover that Einstein’s gavity contribution to the second-order power spectrum dominates the linear-order power spectrum. Thus, the pure Einstein gravity contribution appearing in the third-order perturbation leads to an infrared divergence in the power spectrum.
- Received 16 March 2009
DOI:https://doi.org/10.1103/PhysRevLett.103.021301
©2009 American Physical Society