Horizons in Quantum Gravity

Gravitational path integrals, finite-N holography and string theory have converged: the path integral now computes intrinsically quantum features of spacetime such as replica wormholes, Page curves, black-hole entropy, spectral statistics and near-extremal densities of states, while supersymmetric indices, the giant graviton expansion, fortuity and BPS chaos probe the microscopic Hilbert space of quantum gravity.