Black hole radial geometry from a quantum spin chain

We show that the radial differential equation for a scalar field in an anti-de Sitter black brane background can be encoded in an exactly solvable semi-infinite spin chain independent of dimensionality. The radial coordinate emerges as lattice quasimomentum. Spin coherence encodes the geometry, while the spectrum and response recover gravitational observables and yield exact screening-mass sum rules. We implement the finite chain on a superconducting processor. At finite filling and low energies, the model yields a conformal field theory in a coordinate proportional to proper radial distance.

Source: arXiv:2610.10504v1 - http://arxiv.org/abs/2610.10504v1 PDF: https://arxiv.org/pdf/2610.10504v1 Original Link: http://arxiv.org/abs/2610.10504v1