Time travel possible if parallel universes proved true: study

The theory of parallel universes with multiple timelines, once proved correct, could make time travel come true, according to Howard Wiseman from Griffith University's Center for Quantum Dynamics and his colleagues.

The controversial hypothesis proposed by the research team challenges general cognition of space and time.

The theory, which was presented in a paper published in the Physical Review X journal in November, is based on the Many Worlds interpretation theory in quantum mechanics presented since 1957.

Wiseman said that the best way to describe parallel universes is to consider them as ghost universes. They exist in the same space as the universe that we know of, according to the researchers.

In each of the universes, similar particles use a force to interact with each other, which seems invisible but makes the time travel a possibility, said Wiseman.