Second-order Gauge-invariant Cosmological Perturbation Theory: Current Status

Details Second-order Gauge-invariant Cosmological Perturbation Theory: Current Status Second-order Gauge-invariant Cosmological Perturbation Theory: Current Status

2010-01-15

arxiv.org/abs/1001.2621v2

Advances in Astronomy vol. 2010 (2010), 576273

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

26 pages, 2 figures, Summary report on the current status of the second-order gauge-invariant cosmological perturbation theory

Scientific paper

The current status of the recent developments of the second-order gauge-invariant cosmological perturbation theory is reviewed. To show the essence of this perturbation theory, we concentrate only on the universe filled with a single scalar field. Through this review, we point out the problems which should be clarified for the further theoretical sophistication of this perturbation theory. We also expect that this theoretical sophistication will be also useful to discuss the theoretical predictions of Non-Gaussianity in CMB and comparison with observations.

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