Are you unique? In your perception of the world, the answer is simple: you are different from any other person on this planet. Is our universe unique? The concept of multiple realities or parallel universes complicates this answer and challenges: what do we know about the universe and about ourselves?
One model of potential multiple universes is called the multi-world theory. The theory may seem strange and unrealistic enough that its place in science fiction films, and not in real life. However, there is no experiment that can irrefutably discredit its validity.
The origin of the parallel universe hypothesis is closely related to the introduction of the idea of quantum mechanics in the early 1900s. Quantum mechanics, a branch of physics that studies the microcosm, predicts the behavior of nanoscopic objects. Physicists had difficulties in fitting the behavior of quantum matter to a mathematical model. For example, a photon, a tiny beam of light, can travel vertically up and down as it travels horizontally forward or backward.
This behavior is in stark contrast to objects visible to the naked eye - everything we see moves either as a wave or as a particle. This theory of the duality of matter has been called the Heisenberg Uncertainty Principle (PNG), which states that the act of observation affects quantities such as velocity and position.
With respect to quantum mechanics, this observation effect can affect the shape - particle or wave - of quantum objects during measurements. Future quantum theories, such as the Copenhagen interpretation of Niels Bohr, used.png
In 1954, a young student at Princeton University named Hugh Everett proposed a radical assumption that was different from popular models of quantum mechanics. Everett did not believe that observation raises a quantum question. Instead, he argued that observing quantum matter creates a rift in the universe. In other words, the universe creates copies of itself taking into account all probabilities, and these duplicates will exist independently of each other. Every time a photon is measured by a scientist, for example, in one universe and analyzes it as a wave, the same scientist in another universe will analyze it in the form of a particle. Each of these universes offers a unique and independent reality that coexists with other parallel universes.
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If Everett's Theory of Multiple Worlds (TMM) is correct, it contains many consequences that completely transform our perception of life. Any action that has more than one possible outcome will split the universe. Thus, there are an infinite number of parallel universes and infinite copies of each person.
These copies have the same faces and bodies, but different personalities (one may be aggressive and the other passive), as each of them has an individual experience. The endless number of alternate realities also suggests that no one can achieve unique achievements. Every person - or another version of that person in a parallel universe - has done or will do everything.
In addition, it follows from TMM that everyone is immortal. Old age will never cease to be a sure killer, but some alternate realities may be so scientifically and technologically advanced that they have developed anti-aging medicine. If you die in one world, another version of you in the other world will survive.
The most disturbing consequence of parallel universes is that your perception of the world is unreal. Our "reality" at this point in one parallel universe will be completely different from the other world; it is only a tiny fiction of an infinite and absolute truth. You may believe that you are reading this article at the moment, but there are many copies of you that are not. In fact, you are even the author of this article in a distant reality. So does winning a prize and making decisions matter if we can lose those awards and choose something else? Or live trying to achieve more, if we can actually be dead elsewhere?
Some scientists, such as the Austrian mathematician Hans Moravek, have tried to debunk the possibility of parallel universes. Moravec developed in 1987 a famous experiment called quantum suicide, in which a gun is pointed at a person, connected to a mechanism that measures a quark. Each time the trigger is pulled, the quark spin is measured. Depending on the measurement result, the weapon either fires or does not. Based on this experiment, the gun will or will not fire at a person with a 50 percent chance of being in each scenario. If the TMM is not correct, then the probability of human survival decreases after each quark measurement until it reaches zero.
On the other hand, TMM claims that the experimenter always has a 100% chance of surviving in some kind of parallel universe, and a person is faced with quantum immortality.
When quarks are measured, there are two possibilities: the weapon can either fire or not. At this point, the TMM states that the universe is splitting into two different universes to account for two likely endings. The weapon will fire in one reality, but not fire in another.
For moral reasons, scientists cannot use Moravec's experiment to disprove or confirm the existence of parallel worlds, as the test subjects can only be dead in this particular reality and still alive in another parallel world. In any case, the theory of multiple worlds and its startling implications challenges everything we know about the universe.
Not very clear yet? Nothing wrong…