Hi, I'm a third year physics major. After reading some articles written by friends, I noticed the debates section and thought to myself, "I can contribute to this."

Sciences > Physics Quantum physics: Is time travel theoretically feasible?

7 of 38

Though my imagination hates me for it, I must defend the fact that time travel is theoretically infeasible. Traveling through time would soundly defeat the principal of causality. Causality is not just an axiom of physics; it is the very basis of physics. If I push, then you fall. If the sun burns, then we receive light and heat. If the particle decays, then Schrdinger's cat dies. Even in the world of quantum mechanics, we require that the causation event occurs before the reacting event by at least t=d/c (t is time, d is distance in three dimensions, and c is the speed of light). Th...

More..