This is not the edges. The paper is about a simulation, not actual time travel. Simulated time travel, following typical rules, is just a regular ol’ quantum system that you assign extra meaning to. It was provable that this would work—though still a technical challenge to make it happen.
Except—and apologies if I’m wrong, since I don’t completely understand the article—it seems like they first proved that this was equivalent (under current understanding of QM) to a system that includes a CTC.
So it looks like it’s proving “If quantum mechanics works, this describes a CTC.”
They ignore relativity completely and simulate qubit interaction on a background spacetime with CTCs. Interesting, but has nothing to do with testing the limits of QM.
This is not the edges. The paper is about a simulation, not actual time travel. Simulated time travel, following typical rules, is just a regular ol’ quantum system that you assign extra meaning to. It was provable that this would work—though still a technical challenge to make it happen.
Except—and apologies if I’m wrong, since I don’t completely understand the article—it seems like they first proved that this was equivalent (under current understanding of QM) to a system that includes a CTC.
So it looks like it’s proving “If quantum mechanics works, this describes a CTC.”
They ignore relativity completely and simulate qubit interaction on a background spacetime with CTCs. Interesting, but has nothing to do with testing the limits of QM.
Ah, I see. Thanks.