Applied Physics/Physics Colloquium

Emergent Locality and Gravity from Quantum Error Correction
Tuesday, October 11, 2016 - 4:30pm to 5:30pm
Hewlett 200
Daniel Harlow (Harvard University)
Abstract / Description: 

The Anti-de Sitter/Conformal Field Theory correspondence has given us a precise description of quantum gravity in asymptotically Anti-de Sitter space, as a quantum field theory (without gravity) with one fewer spacetime dimension. This proposal has passed many tests, but the emergence of the extra dimension on the gravitational side remains rather mysterious.

Daniel will present recent work explaining how this emergence can be naturally understood as a manifestation of quantum error correction, an idea originally introduced to solve the seemingly unrelated problem of protecting a quantum computer from decoherence. We will see that this gives precise meaning to speculations over the past decade relating boundary entanglement to the emergence of bulk geometry; to emphasize this precision I will illustrate the proposal using an exactly soluble model of the correspondence constructed via tensor networks.