PIRSA:05090001 Scientific Series Quantum Gravity

DOI10.48660/05090001

Series: Colloquium

Sorkin, R. (2005). Is a past-finite causal order the inner basis of spacetime?. Perimeter Institute. https://pirsa.org/05090001

Sorkin, Rafael. Is a past-finite causal order the inner basis of spacetime?. Perimeter Institute, Sep. 07, 2005, https://pirsa.org/05090001 

@misc{ pirsa_PIRSA:05090001,
  doi = {10.48660/05090001},
  url = {https://pirsa.org/05090001},
  author = {Sorkin, Rafael},
  keywords = {Quantum Gravity},
  language = {en},
  title = {Is a past-finite causal order the inner basis of spacetime?},
  publisher = {Perimeter Institute},
  year = {2005},
  month = {sep},
  note = {PIRSA:05090001 see, \url{https://pirsa.org}}
}

Abstract

The causal set -- mathematically a finitary partial order -- is a candidate discrete substratum for spacetime. I will introduce this idea and describe some aspects of causal set kinematics, dynamics, and phenomenology, including, as time permits, a notion of fractal dimension, a (classical) dynamics of stochastic growth, and an idea for explaining some of the puzzling large numbers of cosmology. I will also mention some general insights that have emerged from the study of causal sets, the most recent one concerning the role of intermediate length-scales in discrete spacetime theories.

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