A standard model wormhole?

  • #1
1,184
349

Main Question or Discussion Point

Apparently the Internet hasn't noticed this paper yet:

http://arxiv.org/abs/1807.04726
Traversable wormholes in four dimensions
Juan Maldacena, Alexey Milekhin, Fedor Popov
(Submitted on 12 Jul 2018)
We present a wormhole solution in four dimensions. It is a solution of an Einstein Maxwell theory plus charged massless fermions. The fermions give rise to a negative Casimir-like energy, which makes the wormhole possible. It is a long wormhole that does not lead to causality violations in the ambient space. It can be viewed as a pair of entangled near extremal black holes with an interaction term generated by the exchange of fermion fields. The solution can be embedded in the Standard Model by making its overall size small compared to the electroweak scale.

It avoids time travel paradox by being longer than the normal distance between the ends. If I have read the paper correctly, to realize this within the standard model, you would have a loop of hypercharge flux threading the wormhole, and the negative energy required by the geometry would arise from excitation modes of hypercharged fermion fields that are associated with the loop of flux.

To some extent this line of investigation has come from Maldacena & Susskind's "ER = EPR", and I wonder just how small you can make this construction. Can you have a spacetime which is just a network of wormholes? Could such a spacetime be understood in almost graph-theoretic terms? And: this wormhole is said to be equivalent to two entangled black holes - could you build up homogeneous macroscopic spacetime by starting with a network of such wormholes, and then appropriately entangling their endpoints?
 
  • Like
Likes atyy

Answers and Replies

Related Threads on A standard model wormhole?

Replies
6
Views
5K
  • Last Post
Replies
16
Views
5K
  • Last Post
6
Replies
148
Views
18K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
1
Views
4K
Replies
4
Views
2K
Replies
15
Views
5K
Replies
8
Views
3K
  • Last Post
Replies
9
Views
4K
Replies
14
Views
4K
Top