What Are Parallel Universes?

Parallel universe means the meaning of each universe contained in the multiverse. A multiverse represents a collection of infinite or finite possible universes. Including everything that exists and may exist: all space, time, matter, energy, and the physical laws and constants that describe them.

Parallel universe

(Astronomical term)

Parallel universe refers to other universes that are similar to but different from the original universe, separated from one universe.

The concept of parallel universes is not because

Scientists will have multiple ways to test these parallel universe theories, and may even rule out some of them. In the next few decades, with the tremendous progress of cosmic measurement technology, scientists will further limit the curvature and topological structure of space through the detection of cosmic microwave background radiation and large-scale material distribution measurement, so as to test the first-level parallel universe theory. A more accurate inflation measurement can be used to test the theory of the second parallel universe. The joint advancement of astrophysics and high-energy physics will also determine the degree of fine-tuning of physical constants, thereby weakening or enhancing the possibility of the existence of the second layer. If global efforts to make quantum computers succeed. Then it will provide further evidence for the existence of the third layer of the universe, because it essentially uses the parallelism of the third layer of the parallel universe for parallel calculations. Conversely, correcting non-conservative experimental evidence excludes the third layer. Finally, the major challenge of modern physics, the success or failure of unifying general relativity and quantum field theory, will bring more inspiration to the study of the fourth layer of the universe. Scientists may eventually find a mathematical structure that matches the universe of the people, or they may suddenly hit an incredible limit of mathematical validity, and have to give up the fourth layer. ^[18]

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The main argument for parallel universes is that they are romantic and bizarre. Consider these two in turn. First, parallel universe theories are easily attacked by Occam's razor principle, because they assume that other universes exist and that people will never observe. Why nature is so wasteful on the body, and indulge in these many to endless different worlds, but this can also support the parallel universe in turn. When people feel that nature is too wasteful, people are confused about what it wastes, which is obviously not "space", because the infinite volume in the standard flat universe model has not caused such objections. Nor is it "substance" or "atoms"-for the same reason, once you have wasted infinite things, who cares if you waste more. So this confusing "waste" is rather a simplification that reduces the amount of information needed to account for all these invisible worlds. However, as Taimak discussed in detail, the entire collection is often much simpler than the individual elements in the collection. For example, the algorithm information content of a common integer n is

On the order of magnitude, this is the number of bits needed to write it in binary. However, the set of all integers, 1, 2, 3, ..., can be generated with only a few lines of computer programs, so the algorithm complexity of the entire set is much smaller than one of the integers. Similarly, the set of all ideal fluid solutions of Einstein's gravitational field equations is far less complex than one of the special solutions, because the former requires only a few equations to describe, while the latter requires a certain hypersurface Specify a large amount of initial data. Strictly speaking, when people limit their attention to a specific element in a set, the content of apparent information increases, but it loses the inherent symmetry and simplicity of the entire system when all elements are taken into account. In this sense, higher-level parallel universes have lower algorithmic complexity. From the normal universe to the first layer of parallel universe, you no longer need to specify the initial conditions, and to the second layer, you do not need to specify the physical constants. At the fourth layer of parallel universe containing all mathematical structures, there is essentially no algorithm Complexity. Only from the perspective of a frog and from the subjective perception of the observer, are there information surpluses and complexity. It can be proven that parallel cosmology is much more economical than a single universe theory that takes only one set of elements as a physical existence.

The second common complaint is that parallel universes are too bizarre. But this objection comes mostly from aesthetic rather than scientific considerations. However, as mentioned above, this opinion is only meaningful in Aristotle's worldview. In the Plato model, if the bird's perspective and the frog's perspective are sufficiently different, it is likely that observers will complain that the correct TOE is so bizarre, and every sign indicates that this is exactly what people are in. There is nothing surprising about the bizarreness that people feel, because evolution has only given people an intuition about everyday physics, which can save people's ancient ancestors. But thanks to wisdom and creativity, people have seen a little bit more than a frog perspective with only a general internal perspective. It is certain that people are experiencing strange phenomena anywhere beyond human original cognition: high speed (slow clock Effect), small scale (quantum particles can exist in several places at the same time), large scale (black hole), low temperature (upstream liquid helium), high temperature (collision particles can change identity), etc. Therefore, physicists have generally accepted that the bird's perspective is very different from the frog's perspective. A modern and popular view of quantum field theory is that the standard model is just a valid theory, the low-energy limit of another theory that has not yet been discovered, which is far from the comfortable classic concept (for example, a ten-dimensional string ). Many experimentalists are already numb to so many "strange" (but reproducible) results. They simply accepted the idea that "this world is a more bizarre world than people originally thought" and then buried their heads and continued Calculation. ^[18]