3 ms·
You can't use entanglement to communicate. Quantum teleportation needs a classical channel to work. > https://en.wikipedia.org/wiki/No-communication_theorem ht
by roywiggins 10y ago
You can't use entanglement to communicate. Quantum teleportation needs a classical channel to work.
> https://en.wikipedia.org/wiki/No-communication_theorem https://en.wikipedia.org/wiki/No-communication_theorem
If you have superluminal communication, signals can travel into your subjective past, which means causality pretty much breaks down entirely. There's no theoretical reason why causality has to hold, but it would make life extremely "interesting"
- pqhwan 10y agoThere was a webcomic (or something like it) I saw a while ago that was about a single-buttoned gadget that could always predict whether you will press the button or not (don't remember the exact mechanism, but that was the jist). The story then went on about how the gadget would bring about humanity's collective philosophical collapse, because of its implications on the subject of free will. I imagine that what you're describing about superluminal communication could be used to make a gadget like this. I'm also wondering if anybody knows which webcomic I'm referring to. It'd be embarrassing if this turned out to be an XKCD number...
- roywiggins 10y agoSounds like a Ted Chiang story: http://www.nature.com/nature/journal/v436/n7047/full/436150a.html http://www.nature.com/nature/journal/v436/n7047/full/436150a... It sounds more like an SMBC comic than an XKCD one, societal collapse for unexpected reasons is an ongoing theme.