scholarly journals Second-order cosmological perturbation theory and initial conditions forN-body simulations

2016 ◽  
Vol 93 (4) ◽  
Author(s):  
Adam J. Christopherson ◽  
Juan Carlos Hidalgo ◽  
Cornelius Rampf ◽  
Karim A. Malik
Keyword(s):  
Perturbation Theory ◽  
Initial Conditions ◽  
Second Order ◽  
Cosmological Perturbation ◽  
Cosmological Perturbation Theory

scholarly journals Second-Order Gauge-Invariant Cosmological Perturbation Theory: Current Status

2010 ◽  
Vol 2010 ◽  
pp. 1-26 ◽  
Author(s):  
Kouji Nakamura
Keyword(s):  
Perturbation Theory ◽  
Scalar Field ◽  
Second Order ◽  
Current Status ◽  
Cosmological Perturbation ◽  
Gauge Invariant ◽  
Cosmological Perturbation Theory ◽  
Theoretical Predictions ◽  
Recent Developments ◽  
The Universe

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 paper, 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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