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Updated: Jun 21, 2026

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
Published on: March 22, 2019
Infrared divergence of pure Einstein gravity contributions to the cosmological density power spectrum
Hyerim Noh1, Donghui Jeong, Jai-Chan Hwang
1Korea Astronomy and Space Science Institute, Daejon, Korea. hr@kasi.re.kr
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.
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