Classical Nature of the Inflaton Field with Self-Interaction : Astrophysics and Relativity
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概要
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Taking into account the effect of self-interaction, the dynamics of the quantum fluctuations of the inflaton field with a λ_φ^4 potential is studied in detail. We find that the self-interaction efficiently drives the initial pure state into a mixed state, which can be understood as a statistical ensemble. Further, the expectation value of the squared field operator is found to be converted into the variance of this statistical ensemble without giving any significant change in the amplitude of fluctuations. These results verify the ansats of the quantum-to-classical transition that has been assumed in the standard evaluation of the amplitude of the primordial fluctuations of the universe.
- 理論物理学刊行会の論文
- 1998-09-25
著者
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Sakagami Masa-aki
Cosmology Group Faculty Of Integrated Human Studies Kyoto University
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Tanaka Takahiro
Department Of Cardiology Showa General Hospital
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