PIRSA:17050043 Conference Quantum Gravity

DOI10.48660/17050043

Conference/School: Shape Dynamics Workshop

Barbour, J. (2017). Shape Dynamics: Perspectives and Problems. Perimeter Institute. https://pirsa.org/17050043

Barbour, Julian. Shape Dynamics: Perspectives and Problems. Perimeter Institute, May. 15, 2017, https://pirsa.org/17050043 

@misc{ pirsa_PIRSA:17050043,
  doi = {10.48660/17050043},
  url = {https://pirsa.org/17050043},
  author = {Barbour, Julian},
  keywords = {Quantum Gravity},
  language = {en},
  title = {Shape Dynamics: Perspectives and Problems},
  publisher = {Perimeter Institute},
  year = {2017},
  month = {may},
  note = {PIRSA:17050043 see, \url{https://pirsa.org}}
}

Abstract

Shape Dynamics(SD) can be derived from principles that differ in significant respects from Einstein's derivation of GR. It requires a spatially closed universe and allows a smaller set of solutions than GR does for this case. There are indications that its solution space can be fully characterized and endowed with a measure. These architectonic features suggest that SD can explain the arrows of time as direct consequences of the law of the universe. They do not require special initial conditions. I will discuss these and other major issues on which SD may cast light. I will also discuss the problems that face SD.

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