Written by: Surabhi Ghimire - 26012, Grade IX
Posted on: 27 February, 2023
Is our universe unique? From science fiction to science fact, there is a theory suggesting that the choices we make in this life play out in an alternate reality and the reality is known as the Multiverse. They are also four dimensional, which means that even though there are many Universes in each Multiverse and that they are all quite far apart from one another, they barely ever collide. The idea of three-dimensional or 3D space is mathematically extended to four dimensions. Hugh Everett presented his major contributions in the late 1950s. where he researched it. By doing so, he is called the father of the multiverse theory by many theorists and scientists, although William James in 1895 came up with the term "multiverse." There are a lot of theories regarding it. According to Max Tegmark, a physicist, there are four “levels” of the multiverse. All the four levels are explained below.
Level 1: Space in our universe goes on far beyond that which we can see, and perhaps goes on forever, which would mean that infinitely many other regions exist in our own pocket universe, regions like our observable universe, where the laws of physics are the same.
Level 2: Multiverses may experience spontaneous symmetry breaking, which can change physical constants. In physics, symmetry breaking is a phenomenon in which small fluctuations acting on a system crossing a critical point decide the system's fate
Level 3: Many-worlds interpretation of quantum mechanics: A level 3 Multiverse is simply another break in symmetry from the lower level Multiverses. Whenever a quantum event appears to have a random outcome, all outcomes in fact occur, one in each branch. Level 4 is called Ultimate ensemble : This level considers all universes to be equally real which can be described by different mathematical structures.
There are many more theories that situate the multiverse within the context of scientific technology. A great example is when, Around 2010, researchers like Stephen M. Feeney claimed to have discovered proof that this universe once collided with other (parallel) universes through analysis of Wilkinson Microwave Anisotropy Probe (WMAP) data. A more thorough examination of the WMAP and Planck satellite data, whose resolution is three times higher than that of the WMAP, however, did not turn up any statistically significant proof of such a bubble universe collision. Additionally, there was no indication that other universes were gravitationally pulling on our own. I personally believe that everyone who is familiar with this topic has their own personal vision of what it would be like for them or the specific verse in general. In this industry, I believe that movies involving the multiverse are seen to be a template for an individual's mind or the general imagination, but it also proves that the people's mind and imagination work differently individually. Sometimes even people who believe in different versions of the universe feel upset about what might have happened in other multiverses that have nothing to do with them. This leads to the question of whether earth was a different planet in the other multiverses.
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