THE THEORY OF PARALLEL UNIVERSES IS NOT JUST MATHS – IT IS SCIENCE THAT CAN BE TESTED - Physics-Astronomy.org

THE THEORY OF PARALLEL UNIVERSES IS NOT JUST MATHS – IT IS SCIENCE THAT CAN BE TESTED

The presence of parallel universes may appear like something cooked up by science fiction authors, with slight relevance to current theoretical physics. 

But the notion that we are living in a “multiverse” that comprises of an infinite number of parallel universes has long been thought a scientific probability – however it is still a matter of strong debate between physicists. The race is now on to discover a way to test the theory, and also searching the sky for marks of interaction with other universes.



It is essential to have in mind that the multiverse view is not in fact a theory; it is rather an outcome of our modern understanding of theoretical physics. This difference is critical. We have not flapped our hands and said: “Let there be a multiverse”. But the impression that the universe is maybe one of infinitely many is resultant of modern theories like quantum mechanics and string theory.

You may have heard the thought experiment of Schrödinger’s cat, a scary animal that exists in a closed box. The action of opening the box lets us to follow one of the probable future histories of our cat, including one in which it is mutually dead and alive. The reason this appears so awkward is simply because our human instinct is not acquainted with it.


But it is completely potential according to the bizarre rules of quantum mechanics. The reason that this can occur is that the space of opportunities in quantum mechanics is enormous. Mathematically, a quantum mechanical state is a sum (or superposition) of all promising states. In the situation of the Schrödinger’s cat, the cat is the superposition of “dead” and “alive” states.

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