Big extra dimensions make Λ too small *

  title={Big extra dimensions make Λ too small *},
  author={Rafael D. Sorkin},
I argue that the true quantum gravity scale cannot be much larger than the Planck length, because if it were then the quantum gravity-induced fluctuations in Λ would be insufficient to produce the observed cosmic “dark energy”. If one accepts this argument, it rules out scenarios of the “large extra dimensions” type. I also point out that the relation between the lower and higher dimensional gravitational constants in a Kaluza-Klein theory is precisely what is needed in order that a black hole… CONTINUE READING
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Discrete Quantum Gravity and Causal Sets ”

  • Rafael D. Sorkin, David D. Reid
  • Canadian Journal of Physics
  • 2001

First Steps with Causal Sets

  • Rafael D. Sorkin
  • (World Scientific, Singapore,
  • 1990
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The causal set as the deep structure of spacetime

  • Rafael D. Sorkin

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