Quantum gravity tomography

Understand

The holographic principle posits that all quantum information in a region of spacetime is encoded on its boundary.

• While there is strong evidence for this principle in certain models of quantum gravity in asymptotically anti-de Sitter spacetime, it is yet to be established whether holography is a generic feature of quantum gravity, or a peculiar property of these models.
• The goal of the present work is to present a model of holographic reconstruction in the framework of perturbative quantum gravity in flat spacetime.
• Specifically, we consider a state in the single-particle sector of a quantum field theory and give a method to completely reconstruct the quantum state from measurement of the metric at spatial infinity.