When it comes to the most puzzling and fascinating hypothesizes in the world of physics, it wouldn’t be so bad to say that the concept of multiple universes holds the front row. Our universe is a great enigma itself and nothing could be said for certain about it. Many theories, however, are given by many physicists, philosophers and curious minds about its shape and size. Some of them believe there is just one universe while many of them are so tenacious on their faith that we are living in a multiverse, where our universe is just a part of it. The dispute is as old as time itself and one more physicist joined the multiverse club, recently.
Sean Carroll, a senior physicist at the California Institute of Technology, strongly believes that The Multiple Universe Theory is more likely to be true rather than another one universe, as he expressed his thoughts in an interview with NBC where he also talked about his new book titled: Something Deeply Hidden.
“It’s absolutely possible that there are multiple universes where you made different decisions”, he said in the interview. “We’re just obeying the laws of physics,” he added.
“We don’t know whether the number of the worlds is finite or infinite, but it’s certainly a large number,” he said when he was asked about the numbers of universes. “There is no way it’s, like, five”.
According to him if we’re not seeing something, it doesn’t mean it is not there.
“Before you look at an object, whether it’s an electron, or an atom or whatever, it’s not in any definite location,” he told the network. “It might be more likely that you observe it in one place or another, but it’s not actually located at any particular place.”
Definitely, Caroll is not the only physicist who believed in this multiverse hypothesis as the great minds like Stephan Hawking and Erwin Schrodinger have already suggested that there are many other parallel worlds.
According to Stephan Hawking, an endless number of universes were created in the Big Bang. Moreover, The String Theory also proposes that there are infinite parallel worlds.
Michio Kaku, an eminent theoretical physicist, once explained earlier, during discussing The String Theory, as our universe is like a soap bubble expanding where we are like insects stuck over the surface. Also, there are other universes like ours and a new universe can be created by either collision of two universes or fission of some already existing ones, and the phenomenon is known as Big Bang. Carroll, however, doesn’t agree with this interaction concept.
“Alternate universes don’t interact, they don’t influence each other in any form”, he said to the NBC. “Crossing over is like traveling faster than the speed of light. It’s not something that you can do.”
The physicist is also not much hopeful about visiting other universes through the wormholes proposed by The String Theory.
The puzzle ‘How many universes’ is not solved entirely yet, but thanks to the advanced quantum physics, we can hope for more insights into this in the near future.