While it hasn’t been proven yet, many highly respected and credible scientists are now saying there’s reason to believe that parallel dimensions could very well be more than figments of our imaginations.
Parallel Universes: More than a Figment of Our Imagination?
International Chairman's Office 
Parallel universes are now a proven scientific fact…At least the ones from quantum mechanics – https://www.prlog.org/12613870-new-similar-experiments-dramatically-achieve-rainer-plaga-suggestion-to-prove-parallel-universes.html