Traversable Wormholes via a Double Trace Deformation · HackerPapers discussions

Traversable Wormholes via a Double Trace Deformation — mentioned by zachf

Thu, 24 Nov 2022 19:54:11 GMT

You might be excited by [0]. The idea there is to study a novel phenomenon in strongly-coupled quantum systems that is very complex to see ordinarily, but becomes easy to understand when you look at the same physics from the gravitational perspective. That would be a nontrivial experimental check of AdS/CFT duality. It's effectively a novel form of "quantum teleportation" wherein an excitation is transmitted between systems using the quantum equivalent of a gravitational wormhole [1]. [0] https://arxiv.org/abs/1911.06314 [1] https://arxiv.org/abs/1608.05687

Paper and discussion history. A mention is not an endorsement.

Traversable Wormholes via a Double Trace Deformation — mentioned by zachf

Sat, 26 Mar 2022 17:43:15 GMT

I can see why it might look like that from the outside, but the set of mathematical results that led up to it actually come from the angle of, “let’s try to prove that traversable wormholes and the negative energy densities required to create them are impossible.” In trying to prove that, you learn a lot of interesting things along the way: 1. Negative energy densities are a universal prediction of all quantum field theories, and therefore are not as outrageous to think about as one might naively believe. [0] 2. The amount of negative energy density permitted by quantum field theory is NOT…

Paper and discussion history. A mention is not an endorsement.