Do you think that at the end of time society will have the technology to time travel back into the past to any point of space-time? If they could then, using more technology, they could transfer the consciousness of every being that ever existed to man-made (artificial) bodies in a man-made (artificial) heaven (or virtual reality) a nano-second or so before the death of the individuals!
Also at the end of time society may have the technology to prolong the end of time indefinetly! Hence, through the advance of technology everyone may become immortal for eternity.
As I understand it, it is not the current assumption of quantum physics that the present has only one past.
It would also probably not be necessary to measure a quantum-level system (particle level) to extract identity-critical information about a mind (the brain). Human identity is prob stored in classical-level synaptic circuitry.
Time travel in general is presumed to be possible by general relativity (closed timelike curves), although that sort of time travel would not be useful to rescuing people in the past.
More relevant is travel to practically identical parallel universes. At least one practical suggestion has been made.
Arcturus said: It would also probably not be necessary to measure a quantum-level system (particle level) to extract identity-critical information about a mind (the brain). Human identity is prob stored in classical-level synaptic circuitry.
>No, you clearly haven't. When you interact with a system in any way, you interact with it at the quantum level. Even when you only record the classical state of the system you collapse it's wavefunction.
Wavefunctions only collapse in the Copenhagen interpretation.
> have you been watching "Sliders"?
Many worlds is Everett not Sliders. Sarcasm is not science.
>"the energy required to twist spacetime sufficiently would be huge, and that with lasers of the type in use today the ring would have to be much larger than the observable universe."
A possibly helpful breakthrough has been the development of the ability to slow light.
>"a theorem proved by Stephen Hawking in a 1992 paper on the chronology protection conjecture,[7] which demonstrated that according to general relativity it should be impossible to create closed timelike curves in any finite region that satisfies the weak energy condition, meaning that the region contains no exotic matter with negative energy."
Hawking has been shown wrong before, smart though he is :)
>perhaps not so practical, eh?
In my opinion, it is worth the scientific experiment to find out.
What if, using a time paradox, future scientists will devise a way of bringing themselves into existence. So the universe we see has been designed by the future scientists. This includes time and so time has been designed to be manipulated by future scientists to allow them to go back in time!
This solves the time travel problem and may explain why the universe is so finely tuned.
Mike Perry, who has written a book called Forever For All, proposes his own suggestion for rescuing people in the past without 'time travel' per se, using computation.
The idea of bringing everyone who has ever lived back to some form of life somewhere is called universal immortalism:
It seems like a very interesting possibility, but we really know too little about what time actually is to begin consider traveling, (the countless paradoxes raised seem to prove this), but in terms of prolonging the end of time, as far as we know, all the "dimension" seem to have no limit, however time may not exist, (certain experiments in particle physics seem to show that it is the interactions and not time that count)