Among quantum physicists, is it generally held?

Question

that the multiverse is a reality? Or do many people think that one cannot extrapolate from the quantum level to the universal?
(Be gentle with me. I can barely add and subtract. Though I did read a book on quantum mechanics once. It had pictures).

Answer 1

The multiverse hypothesis is not the same as the parallel-worlds hypothesis, which is the one associated with quantum physics. Because of the paradoxical difficulties of "the measurement problem" in quantum physics, some thinkers have proposed parallel worlds to explain the "multiplicity of paths" an object in a quantum state could be taking. This idea is still being espoused by some string theorists, but no experimental evidence exists to date confirming this. The multiverse, on the other hand, supposes that the universe that we're aware of is not the only universe, but that it's one of a great many other universes, many of which may have radically different laws of physics. One hypothesis holds that universes pop up and vanishes in this multiverse, so one might think of the multiverse as a "super-universe". The important distinction between "parallel-worlds" and "multiverse" is that while the laws of physics are consistent in the parallel-worlds, they may not be in the multiverse, and indeed, there may not even exist uniform or continuous time through all of the multiverse.

Answer 2

Hello,

(ANS) The concept of the mutiverse isnt so much about quantum mechanics or quantum physics. This idea is only one of a variety of theories which cosmologists & astrophysicists have developed from current observations from tools like the hubble deep space telescope, & particle accelorators such as those at CERN labs.

**The investigations currently offer the following theories:-

a) The big bang which is created from a singluarity, all matter & time start from this moment. The universe is continuing to expand outwards & this can be measured by things like the doppler shift. The current theories postulate that at some point in the distant future the universe will cease expanding & then start to implode in on itself. The big bang is estimated to have taken place some 200 Billion years ago and we have another 200 billion years left before the final collapse event.

b) The "steady state" theory which postulates the universe has always exsisted and will go on exsisting forever, and that time & matter & gravitational forces only change condition. That although universes, stars, planets,etc are born, grow & die the entirity of the wider universe never ceases to exsist.

c) The "multiverse" theory postulates the exsistence of mutiple universes exsistening in the vastness of an unbounded space void and that this theory is born out too some degree by images taken by the hubble telescope. These images show whats now called the local group & it shows literally ga-zillions of mutiple universes.

**There are no rights or wrongs here it all in the relms of theories and postulation. The sheer size & age makes understanding such concepts mind boggling even for so called experts.

IR

Answer 3

multiverse can exist. Given that our universe is but a fraction of the part that formed the 'big bang'.
Even allowing for 'inflation', our universe is extremely 'flat'.
If so and our universe consists of about 10^80 particles then there exists only a certain number of quantum states for these particles.
Upshot is given all the configurations of all the quantum states is that universes start 'repeating' at about 10^96 light years apart. So there you get identical people at identical times doing exactly the same. (in effect, a totally parallel universe with all possible varitions in between). This would if these universes existed certainly resolve many of the paradoxes of time travel!
Beyond this multiverse there can exist a 'hyperverse' where the laws of physics, matter and even causality are different!
These states are obviously mutually inaccessible obviously as this would imply the existence of pre-cognisance, 'miracles', 'supernatural beings' and all manner of strange events.

Answer 4

Hi Jon,
I am no great physics bloke either, but I thoroughly recommend a read of good old Steve Hawkins.
I did a physics degree, and confess that a lot of it was beyond me.
I am a bit more aquainted with it all now, but still go hold on, that is not round ! in atomic terms.
I still have debates about the wave / particle thing in electo-magnetic radiation.
Perhaps I am aging - if the water works under my feet - I ski.
To heck with the molecules.
All the best with it all !
Bob.

Answer 5

I don't know the term multi-verse, but I think string theory is now generally accepted with its 11 dimensions rolled up like so many cigarette papers.

Answer 6

f**ck me, are you on drugs or something, you sound very strange.