Time travel. Hear me out. Quantum nonlocality (similar to, or perhaps the same as quantum entanglement) allows for the possibility of messages to be recieved before they were sent. "You can make the sending operation happen before or after the receiving operation, so in principle you could send messages backwards through time. " https://www.vice.com/en/article/wnj5jw/a-physicist-explains-how-to-send-messages-back-in-time I also recall a theory that data could be sent back in time using time dilation at near light speeds ...or something. I dont recall this one so well, if anyone knows what Im talking about, plz comment. Scientists have also long been dreaming of (and likely working toward, as a sidegig of AI) a way to upload human consciousness into an artificial 'brain' (computer). Put these two things together, and you could 'upload' a consciousness to the past. Obviously there would need to be an artificial brain waiting to recieve the consciousness data, so it wouldnt be you could just go to whenever you wanted... but still. Of course it all based on theorrtical methods that dont exist yet (and possibly never will), but it sounds viable, perhaps in the distant future. I imagine if we ever make a usable artificial brain that can download and run a human consciousness, someone will set one up to await the arrival of a future quantum 'traveller'.
I think you are getting ahead of yourself. First, we need to figure out what consciousness is and then how to upload it to a digital machine. And, in addition, digital is not quantum so it might not even work. But, I do know, from my alien encounters when I was younger, that many different groups of aliens are advanced enough that they can work with consciousness, scan and upload it to their computer, and in one case even copy the soul of an existing person and attach it to them. So it is possible. The next issue is the problem of time travel. I know about this as well because I posted in past science articles that the future affects the past. I entirely believe that information can travel to the past if someone can figure out the right equipment to do it. I don't have an answer to what that equipment would be, though.
Yes this is all highly theoretical. I assume the 'messages can be received before they are sent' is not on a very large scale, perhaps a difference of microseconds? To be useful, that will need to be drastically expanded. And I have no reason to suspect that we are anywhere near being able to turn a human consciousness fully into a transmittable message. And then, assuming those two things are even possible, a human consciousness would likely consist of (imagine the biggest number you can...) number of data points, and thats how many quantum particles will have to be synced up ...in the past. I'm certainly not making the argument that we're anywhere near accomplishing this method of time travel. Merely that it could, in theory, be possible, at some point in the unforeseeably distant future. But then again, if it is possible, then it is also innevitable (precluding some sort of human extinction event), and we merely need to get to the point where we're able to receive and download the human consciousness into something capable of communicating. Then it could, in theory, just tell us how to do the rest. But also that could create a paradox, and I doubt the universe will tolerate paradoxes...
