Horizon Entropy from Quantum Gravity Condensates.

@article{Oriti2016HorizonEF,
  title={Horizon Entropy from Quantum Gravity Condensates.},
  author={Daniele Oriti and Daniele Pranzetti and Lorenzo Sindoni},
  journal={Physical review letters},
  year={2016},
  volume={116 21},
  pages={
          211301
        }
}
We construct condensate states encoding the continuum spherically symmetric quantum geometry of a horizon in full quantum gravity, i.e., without any classical symmetry reduction, in the group field theory formalism. Tracing over the bulk degrees of freedom, we show how the resulting reduced density matrix manifestly exhibits a holographic behavior. We derive a complete orthonormal basis of eigenstates for the reduced density matrix of the horizon and use it to compute the horizon entanglement… Expand
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