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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.
This is an accepted version of this page This is the latest accepted revision, reviewed on 25 January 2025. Hypothetical group of multiple universes Not to be confused with Metaverse. "Multiverses" redirects here. Not to be confused with MultiVersus. For other uses, see Multiverse (disambiguation). Part of a series on Physical cosmology Big Bang · Universe Age of the universe Chronology of ...
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 ...
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 ...
Central to these works is the concept of an Eternal Champion who has potentially multiple identities across multiple dimensions. The multiverse contains a legion of different versions of Earth in various times, histories, and occasionally, sizes.
If each three-dimensional universe exists, then the existence of multiple three-dimensional universes suggests that the universe is four-dimensional. The argument is named after the discussions by Rietdijk (1966) [1] and Putnam (1967). [2] It is sometimes called the Rietdijk–Putnam–Penrose argument. [3]
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 ...