Criticality and Averaging in Cosmology
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概要
- 論文の詳細を見る
We propose comparing cosmological solutions in terms of their total spatial volumes V(τ) as functions of proper time τ, assuming synchronous gauge, and with this intention evaluate the variations of V(τ) about the Friedmann-Lemaitre-Robertson-Walker (FLRW) solutions for dust. This can be done successfully in a simple manner without solving perturbation equations. In particular, we find that first variations vanish with respect to all directions which do not possess homogeneity and isotropy preserving components; in other words, every FLRW solution is a critical point for V(τ) in the properly restricted subspace of the space of solutions. This property may support a validity of the interpretation of the FLRW solutions as constituting an averaged model. We also briefly investigate the second variations of V(τ).
- 理論物理学刊行会の論文
- 1999-11-25
著者
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TANIMOTO Morimitsu
Department of Physics, Niigata University
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Tanimoto M
Yukawa Institute For Theoretical Physics Kyoto University
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TANIMOTO Masayuki
Yukawa Institute for Theoretical Physics, Kyoto University
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TANIMOTO Morimitu
Department of Physics, Niigata University
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Tanimoto Masayuki
Yukawa Institute For Theoretical Physics Kyoto University
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Morimitsu Tanimoto
Science Education Laboratory Ehime University
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TANIMOTO Morimitsu
Faculty of Education, Ehime University
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