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Critics argue that to postulate an almost infinite number of unobservable universes, just to explain our own universe, is contrary to Occam's razor. [91] However, proponents argue that in terms of Kolmogorov complexity the proposed multiverse is simpler than a single idiosyncratic universe. [67] For example, multiverse proponent Max Tegmark argues:
The quantum-mechanical "Schrödinger's cat" paradox according to the many-worlds interpretation.In this interpretation, every quantum event is a branch point; the cat is both alive and dead, even before the box is opened, but the "alive" and "dead" cats are in different branches of the multiverse, both of which are equally real, but which do not interact with each other.
These three "worlds" are not proposed as isolated universes but rather are realms or levels within the known universe. Their numbering reflects their temporal order within the known universe and that the later realms emerged as products of developments within the preceding realms. A one-word description of each realm is that World 1 is the material realm, World 2 is the mental realm, and World ...
The simulated multiverse implies that technological leaps suggest that the universe is just a simulation. The ultimate multiverse is the ultimate theory, saying the principle of fecundity asserts that every possible universe is a real universe, thereby obviating the question of why one possibility – ours – is special. These universes ...
A theory of everything (TOE), final theory, ultimate theory, unified field theory, or master theory is a hypothetical singular, all-encompassing, coherent theoretical framework of physics that fully explains and links together all aspects of the universe. [1]: 6 Finding a theory of everything is one of the major unsolved problems in physics. [2 ...
M-theory is a theory of quantum gravity; and as all others it has not gained experimental evidence that would confirm its validity. [1] It also does not single out our observable universe as being special, and so does not aim to predict from first principles everything we can measure about it.
In physics and cosmology, the mathematical universe hypothesis (MUH), also known as the ultimate ensemble theory, is a speculative "theory of everything" (TOE) proposed by cosmologist Max Tegmark. [ 1 ] [ 2 ] According to the hypothesis, the universe is a mathematical object in and of itself.
In theoretical physics, top-down cosmology is a proposal to regard the many possible histories of a given event as having real existence. [1] This idea of multiple histories has been applied to cosmology, in a theoretical interpretation in which the universe has multiple possible cosmologies, and in which reasoning backwards from the current state of the universe to a quantum superposition of ...