|
|
|
|
|
|
by Strilanc
43 days ago
|
|
|
That is not true. A spanning tree of physical links is sufficient to make a network where anyone can talk to anyone else. The key ingredient here is entanglement swapping [1]. Entanglement between routers A and B can be merged with entanglement between routers B and C to form entanglement between A and C. This accumulates noise, but purification can be used at each merging step to push the noise back down to 1%. So what transmitting a message looks like is a path between the two endpoints is selected and then entanglement swapping+purification is used to turn 1-hop entanglement into 2-hop entanglement, then into 4-hop, then etc until the entire path is spanned. Then purification+teleportation are used by the endpoints to move the message. [1]: https://en.wikipedia.org/wiki/Entanglement_swapping |
|
|