Anthropic Bounds on Lambda from the No-Boundary Quantum State
arXiv:1309.0493 · doi:10.1103/PhysRevD.88.123516
Abstract
We show that anthropic selection emerges inevitably in the general framework for prediction in quantum cosmology. There the predictions of anthropic reasoning depend on the prior implied by the universe's quantum state. To illustrate this we compute the probabilities specified by the no-boundary wave function for our observations at the present time of the values of Lambda and Q in an inflationary landscape model in which both quantities vary. Within the anthropic range of values the no-boundary state yields an approximately flat distribution on Lambda and strongly favors small values of Q. This restores Weinberg's successful prediction of Lambda.
24 pages, four figures, revtex4, references corrected, minor corrections comments
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- The Kontsevich-Segal Criterion in the No-Boundary State Constrains Inflation
- Gauging Fine-Tuning
- Testing typicality in multiverse cosmology
- Cosmic eggs to relax the cosmological constant
- Sharp Predictions from Eternal Inflation Patches in D-brane Inflation
- Spacetime Average Density (SAD) Cosmological Measures
- Spectra of conditionalization and typicality in the multiverse
- Localization on the Landscape and Eternal Inflation
- Lorentzian Vacuum Transitions for Anisotropic Universes