Holographic measurement and bulk teleportation
APA
Antonini, S. (2022). Holographic measurement and bulk teleportation. Perimeter Institute. https://pirsa.org/22120064
MLA
Antonini, Stefano. Holographic measurement and bulk teleportation. Perimeter Institute, Dec. 01, 2022, https://pirsa.org/22120064
BibTex
@misc{ pirsa_PIRSA:22120064, doi = {10.48660/22120064}, url = {https://pirsa.org/22120064}, author = {Antonini, Stefano}, keywords = {Quantum Information}, language = {en}, title = {Holographic measurement and bulk teleportation}, publisher = {Perimeter Institute}, year = {2022}, month = {dec}, note = {PIRSA:22120064 see, \url{https://pirsa.org}} }
In holography, spacetime is emergent and its properties depend on the entanglement structure of the dual theory. An interesting question is how changes in the entanglement structure affect the bulk dual description. In this talk, I will describe how local projective measurements performed on a subregion of the boundary theory modify the bulk dual spacetime. The post-measurement bulk is cut off by end-of-the-world branes and is dual to the complementary unmeasured region . Using a bulk calculation in —which involves a phase transition triggered by the measurement—and tensor network models of holography, I will show that the portion of bulk preserved after the measurement depends on the size of and the state we project on. Interestingly, the post-measurement bulk includes regions that were part of the entanglement wedge of before the measurement. Our results indicate that the effect of a measurement performed on a subregion of the boundary is to teleport part of the bulk information contained in into the complementary region . Finally, I will comment on applications to the eternal black hole in JT gravity (dual to the SYK thermofield double state) and the relationship between measurements and traversable wormholes.