Re: Man arrested at LHC claims he\'s from the future
"Time travelers" as you refer to them, are actually physicists who have volunteered as test subjects for various projects, due to their devotion to their scientific field of study.
You do not 'see' "time travelers" from the future. You may read their postings (text-based information acquisition is fully permitted by the equations, and is scientifically proven as a safe means to communicate), but you will never "see" one, or come into physical contact with a person from the future. Correction, you may come into contact, but you will not be able to 'observe' said person, because you will have no conscious awareness that said person is a 'time traveler'. Therefore, you do not 'observe' the said person. This is crucial. And it is all in the mind, or conscious observation of the 'observer'. If I don't "know" that you are a time traveler, then, I have not observed a time traveler (in my mind). Since all existence is dependent upon conscious observation of the 'mind' (still, even now, undefined), therefore seeing what you don't know what you are seeing is therefore not 'observation'. This means, as defined scientifically, "observation" MUST include a conscious thought that one is actually aware of said observation. If not, then one has not "observed". This has been proven in experimental environments and is an accepted scientific fact, not a theory.
Therefore, now, you can understand that there is no possibility that you can "observe" (see) a time traveler from the 'future', because a) the 'time traveler' possesses knowledge of the previously stated conditions, and experiments are designed to avoid physical "observation" of their existence in your 'time', b) the 'time traveler' does not intend to interrupt causality, which could produce an exponentially destructive effect, and c) the 'time traveler' has only two goals: 1) to study historical events for the purpose of more accurately defining the past, and 2) preservation of his or her observed reality. Further, since quantum systems are indeterminable, we risk varying degrees of altered realities upon returning to our own 'time'. These variations can be great, or miniscule, depending upon the accuracy of our calculations relating to range values of the selected grid points. (more information available on this topic if requested, but of course, only in textual format).
I hope this explanation helps you in your understandings of the science. Thank you.
S.Z.