Yes, there are scientists and researchers in the academic community who explore the possibility of parallel universes or parallel Earths. The concept of parallel universes, often referred to as the multiverse, is a subject of study in various branches of theoretical physics and cosmology. While the existence of parallel universes is still a matter of theoretical speculation and is not currently confirmed by empirical evidence, it is an area of active research and discussion.
One concept within the multiverse framework is the idea of a "many-worlds interpretation" of quantum mechanics, proposed by physicist Hugh Everett III. According to this interpretation, every quantum event gives rise to a branching of multiple universes, each representing a different outcome. This interpretation suggests the existence of an infinite number of parallel universes coexisting alongside our own.
In addition to the many-worlds interpretation, other theories and models, such as string theory, inflationary cosmology, and various versions of the multiverse hypothesis, propose different mechanisms for the existence of parallel universes. These theories often stem from mathematical and theoretical frameworks and are actively studied and debated within the scientific community.
It's important to note that the multiverse remains a topic of ongoing research, and there are different interpretations and hypotheses within this field. While some scientists are proponents of the multiverse idea, others may hold reservations or prefer alternative explanations. The scientific community continues to explore these concepts through theoretical modeling, mathematical frameworks, and potential observational tests to gain a deeper understanding of the nature of our universe and the possibility of parallel realities.