I don't get it - wasn't it concluded that instantaneous communication is impossible, aka you can't transmit information EVEN if you were to take a decade to move two entangled particles apart, all you would get is data from 10 years ago?
but what if causality it actually isn't a certainty in some contexts? Tadah..you would get ala "FTL" comms enabled.
I meant, causality as I understand, it could be not a fully understood concept. We could still find evidence - in the future - that there are phenomena capable of "evade" the cause-effect principle.
https://en.wikipedia.org/wiki/Faster-than-light_neutrino_ano...
You could just send a ship or some kind of vesel with reversed entropy to a star and it will arrive years later, but years sooner that it was launched.
Matter is more or less energy, what if this trick could be done with reversed entropy energy: radio, x-rays, gamma rays, etc.
I can think of two ways in which one would still be limited though. First is that one is limited to dragging signals only as far back as when the necessary machinery was first put in place. This is analog to the limitation of the wormhole time travel hack where you accelerate one close to c, then slow it back down and put it in place again to increase the distance in time to the other end that was stationary the whole time. But perhaps even worse would be the hard limits on how much this could be used before the whole apparatus itself turns into a black hole by the sheer energy being sent back from the far future. it would be like a time lense effectively. Or less spectacularly, it might just get fried. Or perhaps a failsafe would just dump the signal before things get critical. In any case, there would be a limit to how much or from how far in the future one could use such a thing, but other than that it should work, right?