Time Travel Thread - Unity of Beliefs

Is it possible and how can you explain it? I'm just throwing this out there out of curiosity and lack of time to do full research.

Contemporary theory says no, to travel in time you would require the knowledge about every particle in the relevant frame in terms of position and movement which doesn't work because you can only either know where they are or where they go, not both. That's a law of quantum physics. And even if you could, you couldn't know it about ALL of them. Well, and then there is the demand of energy.