Questions tagged [multiverse]
A hypothetical group of multiple universes, each of which would comprise everything that is experimentally accessible by a connected community of observers. DO NOT USE the 'multiverse' tag for the many-worlds interpretation, use the 'quantum-interpretations' tag instead.
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Multiple time dimensions in the eternal inflation model
From a lecture by Prof. Kaiser, I reckoned that according to the Eternal Inflation model, it is possible that all of the 10500 topologies posited by string theory could exist somewhere in the region ...
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What would an inter-universal medium be like?
I don't really believe in the Multiverse Theory, but hypothetically, if universes were like soap bubbles in a foam, what might that foam be like? I know this seems like an opinion-based question but ...
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Does Everett's interpretation of QM necessarily imply "many worlds"?
I've been dabbling in physics/QM for just a few years, and was reading "The One: How an ancient idea holds the future of physics" - my interest was piqued because I've read quite a bit about ...
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Is the equation $E=mc^2$ universal for any 4-dimensional spacetime? [closed]
Assuming a multi-verse theory and an alternative universe which spacetime is however still 4-dimesnional (i.e. three spatial and one temporal dimensions) but with a maximum speed of causlaity that is $...
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Defining Tegmark's level IV multiverse [closed]
I am bit bothered by the "definition" of Tegmark's level IV multiverse. I have read that it is a "collection of all mathematical models" (whatever that means). I have also read ...
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How does the quantum landscape of Mersini-Houghton's multiverse theory become physical?
In her new book (Before the Big Bang), Dr. Laura Mersini-Houghton elegantly describes the "quantum landscape of the multiverse", an abstract quantum field of energies where an inflaton (...
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Quantum choices and Universe splitting
Multiverse theory says that when a choice is made between two quantum states, the Universe splits. What happens if there are 3 or more choices that need to be made? Will that state make the Universe ...
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How does eternal inflation (from a possibly finite space-time region) produce infinitely large pocket universes?
The title almost already completely captures my question: In reviews and summaries of eternal inflation models, it is typically stated that the arising pocket universes (to be precise: the space-time ...
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Probability in the Multiverse Interpretation of Quantum Mechanics [duplicate]
The Multiverse Interpretation of Quantum Mechanics interprets a quantum decision as different universes, each with each outcome. I was wondering how probability plays into this. For example, if we ...
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Does the Multiverse Theory rely on Superposition?
Note: I'm not asking if the Multiverse Theory and the MWI are the same thing, cf. e.g. this Phys.SE post.
If I understand it correctly, the Multiverse Theory doesn't rely on the Many Worlds ...
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Karen Barad's theory of agential realism - does it stand on solid scientific ground or is it quantum quackery? [closed]
Before you vote to close this question as off-topic, please note that while my interest in the topic lies on the metaphysical guesswork, my question here is specifically about Karen Barad's scientific ...
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Black Hole Singularity Other Universe
It is thought that there is another universe beyond the singularities of black holes. Is it because width of the light cones become zero at the singularity, meaning that you can cross infinite ...
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Other Side of an Einstein Rosen Bridge
We get an ERB when we replace $u^2$ by $r - 2M$ in Schwartzchild Metric, therefore the metric becomes symmetric along the horizon $(r = 2M)$. Why should it mean that crossing the horizon leads you to ...
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Wigner friend experiment with qbits
Suppose that in his isolated box, Wigner's friend measures a qbit in state $|→⟩=\dfrac{|↑⟩+|↓⟩}{\sqrt{2}}$ along the vertical axe. Then, he sends Wigner (who remains outside the box) a qbit in the ...
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Why are inflationary bubble universes spatially infinite from the inside but finite from the outside?
In The Hidden Reality, Brian Greene describes the bubble universes that would arise from inflation as being spatially infinite as observed by a viewer on the inside of the universe, yet spatially ...
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