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Detecting or Falsifying the Multiverse

Daan Meerburg. David Spergel. Detecting or Falsifying the Multiverse. Is our observational Universe unique or is it part of a much larger multiverse? . What are the possible signatures in our observable Universe and how should the signatures be optimally extracted from the data?.

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Detecting or Falsifying the Multiverse

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  1. Daan Meerburg David Spergel Detecting or Falsifying the Multiverse

  2. Is our observational Universe unique or is it part of a much larger multiverse?

  3. What are the possible signatures in our observable Universe and how should the signatures be optimally extracted from the data?

  4. We can measure the multiverse if: *Negative Curvature *Bubblecollisions *Vacuum from the Multiverse

  5. *Negative Curvature De Sitter Parent Universe Emerging Universe needs to be Negatively curved Improve constraints using multiple data sets: e.g. redshift-space distortions and CMB-lensing galaxy correlations

  6. *BubbleCollisions Stephen Feeney et al. See e.g. Matthew Kleban’s group and talk

  7. *Vacuum from the Multiverse Question? Is there an observational difference between our Universe just being de Sitter or being a de Sitter bubble nucleated in a mother de Sitter space (akatheMultiverse)? This will depend on the ground state of the parent Universe (inaccessible spacetime) What determines the state ?

  8. vs

  9. *Vacuum from the Multiverse Potential signatures ? ? Use CMB, LSS to constrain potential signatures Requires development of new observational strategies/ estimators

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