I am not a physicist but enjoy the topic and I am trying to write a story that includes an argument about quantum mechanics.

Basically, the question is: How, if possible, could a human be transported to another dimensional space beyond the 3 plus time of our space? In other words travel to a parallel universe.

My thought on this are:

* we have mathematical proof that other dimensions exist. That there may be as many as 11.

* Dimensions are observable only in particle accelerators when we smash matter to bits, so how do you get at the dimensions without destroying matter in our space to do so.

* If we had the technology, "unrolling" a string to get a a dimensional doorway doesn't necessarily guarantee that the door way goes to a one, two, or three dimensional space nor do we know if that space follows the same physical rules as our space. So going through might be immediate death.

For the story, I am trying to make the negative argument. The positive argument seems easy because you can just say at some point in time in the future, we will figure out a way. But I am trying to be technically correct in making a negative argument. So , if anyone could clarify these thoughts I would be most appreciative.