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Horizon entropy from quantum gravity condensates · Around

2015

Horizon entropy from quantum gravity condensates

Oriti, Daniele, Pranzetti, Daniele, Sindoni, Lorenzo

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We construct condensate states encoding the continuum spherically symmetric quantum geometry of an 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 an 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 entropy.

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Then

D. Oriti, D. Pranzetti, J. Ryan and L. Sindoni, Class. Quant. Grav. 32
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