Quantum Gravity, or The Art of Building Spacetime

  title={Quantum Gravity, or The Art of Building Spacetime},
  author={Jan Ambjorn and J. Jurkiewicz and R Loll},
The method of four-dimensional Causal Dynamical Triangulations provides a background-independent definition of the sum over geometries in quantum gravity, in the presence of a positive cosmological constant. We present the evidence accumulated to date that a macroscopic four-dimensional world can emerge from this theory dynamically. Using computer simulations we observe in the Euclidean sector a universe whose scale factor exhibits the same dynamics as that of the simplest mini-superspace… Expand

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