Density matrices in quantum gravity

14 Sep 2020 Anous Tarek Kruthoff Jorrit Mahajan Raghu

We study density matrices in quantum gravity, focusing on topology change. We argue that the inclusion of bra-ket wormholes in the gravity path integral is not a free choice, but is dictated by the specification of a global state in the multi-universe Hilbert space... (read more)

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Categories


  • HIGH ENERGY PHYSICS - THEORY
  • GENERAL RELATIVITY AND QUANTUM COSMOLOGY