Use of δN Formalism : Difficulty of Generating Large Local-Type Non-Gaussianity during Inflation(Chapter II: Cosmological perturbations,Cosmology-The Next Generation-)
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概要
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We discuss generation of non-Gaussianity in primordial density perturbation through the super-horizon evolution during inflation by using the so-called δN formalism. In order to discuss the difficulties of generating large local-type non-Gaussianity during inflation, we discuss Kadota-Stewart model. This model gives an example in which we have to choose rather unnatural initial conditions even if large non-Gaussianity can be generated.
- 2011-10-31
著者
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SUYAMA Teruaki
Research Center for the Early Universe, The University of Tokyo
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YOKOYAMA Shuichiro
Department of Physics and Astrophysics, Nagoya University
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Suyama Teruaki
Research Center For The Early Universe The University Of Tokyo
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Tanaka Takahiro
Yukawa Institute For Theoretical Physics Kyoto University
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Yokoyama Shuichiro
Physics Department Nagoya University
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