Probability of boundary conditions in quantum cosmology

Yasusada Nambu, Hiroshi Suenobu

研究成果: ジャーナルへの寄稿会議記事査読

1 被引用数 (Scopus)


One of the main interest in quantum cosmology is to determine boundary conditions for the wave function of the universe which can predict observational data of our universe. For this purpose, we solve the Wheeler-DeWitt equation for a closed universe with a scalar field numerically and evaluate probabilities for boundary conditions of the wave function of the universe. To impose boundary conditions of the wave function, we use exact solutions of the Wheeler-DeWitt equation with a constant scalar field potential. We specify the exact solutions by introducing two real parameters to discriminate boundary conditions, and obtain the probability for these parameters under the requirement of sufficient e-foldings of the inflation. The probability distribution of boundary conditions prefers the tunneling boundary condition to the no-boundary boundary condition. Furthermore, for large values of a model parameter related to the inflaton mass and the cosmological constant, the probability of boundary conditions selects an unique boundary condition different from the tunneling type.

ジャーナルJournal of Physics: Conference Series
出版ステータス出版済み - 8月 21 2017
イベント8th International Workshop on Decoherence, Information, Complexity and Entropy, DICE 2016 - Castiglioncello, イタリア
継続期間: 9月 12 20169月 16 2016

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)


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