Questions tagged [multiverse]

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32 views

Is there any possibilities that in multiverse in another situation any civilization may exist and they can live in different conditions than ours [closed]

If this is a possibility,they must have some different quality than ours.Then what can be those qualities.
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1answer
63 views

Would Wheeler's oscillatory universe model create absolutely different universes in each cycle?

According to physicist John Wheeler, the universe is part of a sequence of cycles of Big Bangs and Big Crunches, called cyclic or oscillatory universe model: https://en.m.wikipedia.org/wiki/Multiverse ...
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56 views

Did Wheeler propose some kind of variation of MWI where universes would have different laws of physics?

John Wheeler proposed along with Hugh Everett and Bryce DeWitt the 'Many Worlds' Interpretation of Quantum Mechanics (although he expressed some doubts about its validity) I have read, from an ...
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1answer
75 views

Why is the measure problem an issue if the universe is always finite?

As a follow-up from this question, I was wondering how the measure problem applies to the idea of eternal inflation. First, why is it even a problem? As time progresses, more universes are created in ...
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26 views

Is it possible that the acceleration of the growth of our universe is driven by the overall gravitational pull of neighboring universes [closed]

I am painfully unequipped when I think about my my knowledge of physics. Still, I am enthralled, as many of us are, by the mysteries and complexity of the universe, both known and unknown. I was ...
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55 views

Is it there any theory or model in theoretical physics that is akin to Tegmark's Mathematical Universe Hypothesis?

Physicist Max Tegmark proposed a hypothesis that asserts that all mathematical structures do exist as universes. (https://en.wikipedia.org/wiki/Mathematical_universe_hypothesis) But this hypothesis ...
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1answer
74 views

Multiverse and the anthropic principle? [closed]

In this paper (https://arxiv.org/abs/hep-th/0211048) by physicist Andrei Linde, the multiverse concept, the anthropic principle, quantum cosmology and inflationary cosmology are analyzed. In the ...
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1answer
67 views

Are there other theories (apart from string theory) that combined with inflation, would produce universes with different laws?

In chaotic inflation, space would stop expanding in some points, creating hubble volumes that could experience different spontaneous symmetry breaking, which would result in different properties, such ...
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2answers
79 views

Examples of theories that assume the existence of an “External Reality”?

In this paper written by physicist Max Tegmark (https://arxiv.org/pdf/0704.0646.pdf) it talks about "External Reality Hypothesis". Specifically, he says: Although many physicists subscribe to the ...
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65 views

Is the universe a closed system?

Most places say it is. But according to the multiverse hypothesis, gravitons and other quantum particles could travel from one universe to another. Wouldn't matter-energy then be transferred and thus ...
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1answer
101 views

Could micro-states not have equal probability as assumed? [closed]

How could micro-states have uniform distribution in a 3D space unless there was 0 Gravity? Gravity violates the assumption of equal probability as it makes matter move in a predictable direction. ...
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1answer
84 views

What are the laws of physics of the Multiverse ? What is the multiversal constant? [closed]

What are the laws of physics outside our Universe ? Can a Multiverse constant exist ? And what is the Multiverse constant if it exists ?
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1answer
64 views

Tegmark's level 1 multiverse - why does infinite set of universes imply existence of a universe almost identical to ours?

In "Our Mathematical Universe" Tegmark claims that inflation theory implies existence of (countably, it seems to me) infinite set of universes. He says that from this follows existence of a universe ...
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2answers
85 views

Charge of multiverse

The charge of the universe is said to be zero. The most general argument I hear about this is that: since there was no net charge before the universe there must not be any after. Hence the universe is ...
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0answers
75 views

Could information in a boundary be modified once encoded in holographic principle?

There are models of universes where holographic principle has a different correspondence (there is absolutely no reason to assume that this would hold true for all possible universes. You could have a ...
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1answer
69 views

Can holography be applied to every model?

Can all models have a holographic representation? I was talking with a physicist and he told me: "Holography is not a property you can just apply to any model of the universe willy-nilly. It either ...
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1answer
75 views

Have string theory and brane cosmology the same landscape?

Has any of these hypothetical theories a "higher" number of possible universes or has string theory landscape the same type of possible universes than brane cosmology?
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1answer
177 views

Heat death in eternal inflation

Heat death is the predicted fate of the universe. Eternal inflation theory states that new hydrogen atoms are created in each pocket universe so that means new hydrogen atoms are still being created ...
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3answers
194 views

How is the multiverse possible with the law of conservation of energy? [closed]

So I am not a physicist or have any background in physics but I enjoy thought experiments and thinking about the nature of our universe and I was thinking about the idea that we live in a multiverse ...
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2answers
255 views

Time and the Multiverse [closed]

Is a clock in one universe of any use to someone in a different universe? Supposing the multiverse model is correct, it posits the existence of several distinct universes that exist independently of ...
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1answer
165 views

If Hawking's last paper is correct, is it valid to assume that we live in a 5 dimensional universe?

If I understand Hawking's last paper, "A smooth exit from eternal inflation?" (2018-04-27), correctly it implies that the Big Bang generated more universes than our own. This means that to locate a ...
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0answers
102 views

What physical laws would need to change? [closed]

My fictional worlds reside in a multiverse. More specifically, they reside in a universe within that multiverse that is very similar to ours. But here are some big differences: White holes are in ...
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3answers
307 views

Is this interpretation of quantum fluctuation in eternal inflation in Wikipedia correct?

Wikipedia's article on inflation says Although new inflation is classically rolling down the potential, quantum fluctuations can sometimes lift it to previous levels. These regions in which the ...
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1answer
152 views

Does quantum fluctuation cause the inflaton value to increase in eternal inflation?

I would like to ask about slow-roll eternal inflation. Is it possible that the effects of quantum fluctuation can cause the inflaton value higher in some regions?
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1answer
202 views

Why can't white holes exist? [closed]

Why can't white holes exist? Also considering that there are infinite universes with infinite possibilities can there be a universe where white holes can exist and black holes cant, or maybe they can ...
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1answer
251 views

Do bubble universes in eternal inflation have edges?

I've been having a hard time understanding bubble universes in eternal inflation. So they are just finite regions of space where inflation has stopped and Hubble expansion has taken over? I just can't ...
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2answers
422 views

What phenomenon is Hawking radiation intended to explain?

I understand that science exists to make predictions, and that "unitarity" (the 100% total of the probabilities of all possible outcomes) is a major factor in the morale of scientists. However, in ...
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1answer
417 views

Does the Level I Multiverse theory violate the 2nd Law of Thermodynamics?

As far as I can understand, the Level I Multiverse theory is based on the idea of eternal inflation. It states that considering an eternally inflating and expanding universe, an infinite amount of ...
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1answer
616 views

Einstein-Rosen bridge through multiverse? [closed]

The Einstein-Rosen bridge describes a short cut between two point by "connecting" the two destinations in a folded 2-dimensional representation of the three dimensional universe, but if the universe ...
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0answers
38 views

Is it conceivable to have the Heisenberg uncertainty to take on a different value? [closed]

Would it be possible to conceive of a universe in which the maximal precision of measurement is greater or less than the current value? If so, what macroscopic effect would it have? Would it ...
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2answers
226 views

Correct my view of the multiverse?

First of all my apologies in case my understanding turns out to be wrong and idiotic. Being a layman in physics and cosmology, i have just started reading Brian Greene's book "The Hidden Reality". Now ...
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1answer
115 views

Gravitational waves and Michio Kaku [closed]

I was reading a book from 2005 written by Michio Kaku (Parallel Worlds). In the book it is stated, that if gravitational waves should be detected, then that proves the multiverse theory. is there any ...
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2answers
518 views

Tegmark's Computable Universe Hypothesis &

Apart from the (well founded) critics to Tegmark's Mathematical Universe Hypothesis (https://arxiv.org/abs/0704.0646 ) I´d like to know how he justifies the assumption of the Computable Universe ...
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3answers
557 views

Does Level IV Multiverse/Ultimate Multiverse contains 'impossible worlds'? [closed]

Does Level IV Multiverse/Ultimate Multiverse contains 'impossible worlds'? Does it contain universes with sets, structures, or systems that exist beyond spacetime, duality, or existence and ...
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1answer
150 views

Are there really infinite alternatives? [duplicate]

The Multiverse theory says that there are infinite alternatives of our universe, many of them are very similar to the one were we live other are completely different. But the number of parallel ...
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3answers
358 views

Regardless of the multiverse. How are our constants and laws communicated across our universe, and my bathroom?

Assuming the multiverse theory is true, then each universe has a different set of constants and it provides a reasonable explanation as to why the constants in our universe seem set 'just right' for ...
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1answer
564 views

What type of thermodynamic system is the universe? [closed]

I was studying thermodynamics and came across a thought that Which type of system is the universe? Is it closed,open, or adiabatic(isolated)? Is it even a system ? Can it ever be a system? Assuming ...
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0answers
71 views

Energy of background radiation while falling into a black hole

As you fall into a black hole, the old story is you would be spaghettified - and this question is not about that. However passing of time would be warped, so you would see the future of the universe ...
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0answers
211 views

Criticism of physics in _The Beginning of Infinity_? [closed]

Have any criticisms been written of the physics presented in David Deutsch's book The Beginning of Infinity? Does he make any mistakes? If so, please refer me to them.
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1answer
89 views

What is the difference and/or similarity between multiple universes in inflation and in quantumphysics? [duplicate]

Some theories propose that there are more universes. In one of them it is said that there are parallel universes, due to inflations after the big bang that created them. But in the two-slit ...
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4answers
2k views

Does physics claim that every possible world has or will exist? [closed]

Has physics proven that every possible world has or will exist? Someone on-line, who actually seems fairly intelligent, but troll-ish, claims that there is good reasons for it, not from any ...
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0answers
185 views

Why is Weinberg's prediction of omega sub lambda ($\Omega_{\Lambda}$) other than sophisiticated tautology?

I am not a physicist, but I do have a background in engineering (EE and computer science) and have followed physics and cosmology on a primarily conceptual basis for many years. I have looked at ...
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1answer
386 views

Why do fundamental particles have charge? [duplicate]

More specifically, what is in the nature of these particles that they carry a charge, and thus repel objects of similar charge and attract those of opposite charge? Also, why would the charge of an ...
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0answers
211 views

Black Holes and the Multiverse [closed]

Are there any peer-reviewed theories which explore the idea that black holes in our universe may spawn other universes - or that our universe came from a black-hole-like event in another universe? ...
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0answers
988 views

If our universe is a “baby universe” [closed]

There are several theories that claim that our universe is simply a black hole in a "parent" universe: Stephen Hawking wrote a book called Black Holes and Baby Universes. Here he talks about black ...
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0answers
294 views

Multiple Intersecting Universes [closed]

I am not a relativist or cosmologist, so this is very qualitative: I imagine a pair of universes, where each has two spatial dimensions (plus time), embedded in a 3-D (plus time) space, and these ...
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0answers
62 views

Multiverse fictional constraints [closed]

In a multiverse the only thing that does not exist is fiction - true / false ? Specifically is anything fictional ever written (Star Wars, Harry Potter, Last and First Men etc etc) actually non ...
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1answer
183 views

Is a type I parallel Universe possible?

A type I parallel Universe (according to Max Tegmark) is a universe that is infinite and looks everywhere more or less like our universe does (it's homogeneous). Tegmark claims that within this ...
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1answer
296 views

Universe vs Multiverse. Time and Space

Wikipedia defines a multiverse as a hypothetical set of finite and infinite possible universes. Similarly, it defines the Universe is as "all of time and space and its contents". On the surface, ...
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2answers
2k views

Can multiple timelines exist according to theoretical physics? [closed]

Multiple timelines is not a reality yet (as of 2016's science and technology), but exists only in Marvel/DC universe. It is something that is used to explain the paradox of time-travel. If you go back ...