From DeWitt initial condition to cosmological quantum entanglement

A. Davidson, T. Ygael

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


At the classical level, a linear dilaton action offers an eternal inflation evolution governed by the unified (cosmological constant plus radiation) equation of state ρ- 3P = 4. At the quantum mechanical mini-superspace level, a two-particle variant of the no-boundary proposal, notably one-particle energy dependent, is encountered. While a (gravityanti-gravity) GaG-odd wave function can only host a weak Big Bang (BB) boundary condition, albeit for any k, a strong BB boundary condition requires a GaG-even entangled wave function, and singles out k = 0 flat space. The locally maximal values for the cosmological scale factor a and the inverse Newton constant φ form a grid {a2, a } ∼√4n 1 +1 √4n2+1.

Original languageEnglish
Article number152001
JournalClassical and Quantum Gravity
Issue number15
StatePublished - 6 Aug 2015


  • DeWitt initial condition
  • dilaton
  • mini superspace
  • quantum cosmology
  • quantum entanglement


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