12
votes
Accepted
Does physics claim that every possible world has or will exist?
At present, mainstream physics posits that the underlying level of all natural phenomena is quantum mechanical.
There exists the standard model of particle physics, a mathematical model, where it is ...
- 229k
10
votes
Accepted
Can a perfectly mathematically describable universe exist in a multiverse?
Disclaimer: Here is my metamathematical take (but read that as a very very very recreational bunch of statements).
Gödel second incompleteness theorem says that the completeness of a logical theory (...
- 11.7k
9
votes
Does physics claim that every possible world has or will exist?
In short: No.
Based on the Many-Worlds-Interpretation of QM, you can make statements of this kind, but as the name says, it is just an interpretation, whose ontological statements are highly ...
- 1,043
7
votes
Can existing quantum computers be considered evidence for parallel universes?
The question is whether quantum computing necessarily implies that the many worlds interpretation of quantum mechanics is correct. This issue is dealt with in the question How much is quantum ...
- 343k
5
votes
Karen Barad's theory of agential realism - does it stand on solid scientific ground or is it quantum quackery?
I have upvoted the question and will not vote to close; my reasoning will be intertwined with my answer as follows.
I self-identify as a recovering ex-engineer with an avid interest in physics and one ...
- 82.6k
4
votes
How can the mass of Higgs give preference to SUSY vs multiverse?
Mitchell Porter’s answer is very interesting. However, it is also very divergent from what the movie conveyed and the current state of the SUSY vs. Multiverse debate. He uncovers an interesting ...
- 186
4
votes
Accepted
Is there an exact formal definition of the Universe?
If the question is asking whether there is a definition that encapsulates our universe, then I believe the answer is No. This is because encapsulating a "space" into a formal system requires defining ...
- 266
4
votes
Can existing quantum computers be considered evidence for parallel universes?
The debate over evidence for the many worlds interpretation is largely misconceived. Suppose that you take quantum mechanical equations of motion seriously and apply them to all physical systems, ...
- 6,096
4
votes
Does physics claim that every possible world has or will exist?
Just because all things are possible, does not mean that all possibilities actually exist. And then, to say they simultaneously exist goes even further. They merely exist as "possibilities", or ...
- 41
4
votes
Can a perfectly mathematically describable universe exist in a multiverse?
How can one predict the future of such a universe when inter-universal travel is possible and the multiverse is not perfectly mathematically describable?
Inter-universal travel should NOT be possible ...
- 481
4
votes
Randomness in parallel universes
Assuming that by RNG you mean a quantum mechanical random number generator, the two RNGs would only produce the same outputs if they are entangled. Otherwise the two outputs would be uncorrelated and ...
- 24.3k
3
votes
Is a type I parallel Universe possible?
Well, you are supposed to think about a volume of 100000 light years radius around the solar system. If at a given instant, two volumes are exactly the same, even if there is a significant difference ...
- 260
3
votes
Stephen Hawking's theory of multiple universes
This is a very broad question but I'll try and answer it. I'll not include any mathematics in my answer. If you would like me to get into technical details then let me know and I'll edit my answer. ...
- 93
3
votes
Is there an exact formal definition of the Universe?
Sometimes the word universe is just used colloquially and can just refer to everything on some side of a horizon (an event horizon, a causality horizon, etc.) But when used precisely, I'm sure ...
- 25k
3
votes
Regardless of the multiverse. How are our constants and laws communicated across our universe, and my bathroom?
The fact that universal laws exist, in a universe this big and partly disconnected, suggest that these laws are not created or distributed from anywhere, but that the laws just hold everywhere because ...
- 382
3
votes
Accepted
What phenomenon is Hawking radiation intended to explain?
You seem to be saying, and asking if the numbers might work out, that maybe the Hawking radiation from the black hole (BH) which when contracting towards a near singularity bounces from the spin-...
- 13.8k
3
votes
Accepted
If Hawking's last paper is correct, is it valid to assume that we live in a 5 dimensional universe?
tl;dr- There's no need to preemptively standardize terms and notation. Individual authors will choose their own terms and notation as appropriate, and standards can emerge when individual authors ...
- 4,583
3
votes
Could micro-states not have equal probability as assumed?
As per my observation, Micro-states do no have equal probability
Statistical mechanics doesn't say that all microstates have equal probability in the first place. It postulates: all microstates ...
- 35k
3
votes
Fabric of reality shadow photon partitioned off into parallel universes among themselves?
I'm inclined to say that Deutsch is just wrong.
What he calls parallel universes in all of his writings are what everyone else calls paths or histories (in the context of the Feynman path integral / ...
- 21.9k
2
votes
How could the multiverse theory be disproven?
It is important to specify which multiverse theory one wants to disprove. Some are possible, others are not.
Tegmark's "Level I" model, where the universe is spatially infinite and hence ...
- 29.6k
2
votes
How do we prove the existence of a multiverse?
You don't. That's because Multiverse is not a scientific hypothesis. It speculates that there are numerous universes out there. Those are not observable. They would have each their own set of laws ...
- 186
2
votes
Accepted
What lies at the very edge of the expanding universe?
What would we see just outside of it? Pure blackness or other expanding bubbles of multiverses?
Outside our particle horizon we assume that everything is more or less the same like where we are, at ...
- 9,525
2
votes
What is the difference and/or similarity between multiple universes in inflation and in quantumphysics?
The inflationary theory you mention is probably eternal inflation. In this theory there is just one universe but different parts of it are causally disconnected i.e. the different parts cannot affect ...
- 343k
2
votes
Tegmark's Computable Universe Hypothesis &
The CUH can be justified by invoking the Church–Turing–Deutsch principle:
The principle states that a universal computing device can simulate every physical process.
No counterexamples are known, ...
- 9,848
2
votes
Does the Level I Multiverse theory violate the 2nd Law of Thermodynamics?
Energy conservation does not even hold in a classical expanding universe, without parallel worlds. For example, the redshift of photons due to the cosmic expansion is actually a loss of energy.
- 121
2
votes
Accepted
Why can't white holes exist?
It's not that they can't exist, it's rather they're extremely unlikely to exist, and furthermore if they did, they would be gone shortly after they came into existence.
The term "extremely unlikely" ...
- 19k
2
votes
Is this interpretation of quantum fluctuation in eternal inflation in Wikipedia correct?
''Is the interpretation of quantum fluctuation in Wikipedia correct from the point of view of QFT? Or does the inflaton field just simply roll down its potential without any effects from quantum ...
- 43.7k
Only top scored, non community-wiki answers of a minimum length are eligible