Sabine Hossenfelder is a research fellow at the Frankfurt Institute for Advanced Studies in Germany. Her research focuses on general relativity and quantum gravity. She is author of the blog Backreaction and her first book, Lost in Math, is set to appear in June. You can find her on Twitter at @skdh.
I think it gets down to the difference between models and reality.
Normal people want to know what “reality” is; but all science can ever really do is give us models that (ideally) predict what will happen.
Hey . . . just so long as Equestria is real!
So... Are there an infinite number of timelines in each of the infinite number of universes too?
What if Spartacus had a Piper Cub?
I want the universe where I am a multi-billionaire................
Multiverse then would prove there is at least one universe that there is a omnipotent God. And if He is Omnipotent then He is not limited by the Multiverses.
So they proved the existence of God.
So, do I take the red pill, or the blue?
The multiverse was the PhD. thesis of Hugh Everett III, with John Wheeler as his advisor. Niels Bohr absolutely rejected the hypothesis, so Everett never published in physics again. After Bohr died in 1962, it still took another 10 years before other physicists took up the theory. Now it is one of two major competing theories of everything - the other being one universe.
Hawking says the theory is true but trivial. He means that since (in his opinion) we can’t get information from other universes, and since they are (in his opinion) orthagonal, they don’t interact with this universe in any way.
However, about half of currently working physicists disagree. Because of quantum uncertainty, there must be interactions between various parts of the multiverse. However, again because of quantum uncertainty, it is not clear if signals can pass between the universes. Signals = detection = information. Twenty or fifty years ago, it wasn’t clear that we could ever detect planets in other solar systems. Now it is routine.
Mysteries in cosmology include: we don’t know the mass of this universe, what dark matter consists of, what dark energy consists of (some argue that dark energy misapplies the mathematics), or how a spiral galaxy can exist - it should fall apart in less than one billion years, and should certainly not retain a spiral shape over more than 200-500 million years. So multiverse vs. universe is an open question, one that has a theoretical answer (multiverse), but without any observations or experiments to provide additional support.
I read every single word and I would write my critique but I am busy building a spaceship that can go faster than the speed of light.
Jesus is the Word, the Uni-Verse.
Multi-Verse makes no sense.
Who gives a fig?
He wants to create a quantum Turing machine to test them out.
They gave me my money back.
Scientist looked at the 53 Universal contants, and the odds of this Universe working, odds of....Well, write a 1, now start writing zeros, get back to me in a trillion trillion years, and you may be close. Scientist realized it was impossible, and that’s when the “MultiVerse” idea was born. I once heard a German cosmologist say, “There is either a Multiverse or a God”. Without even the slightest Evidence, the “Muti-Verse” was born.
anti-God scientists are desperate to avoid the creator
I wonder if her skepticism goes so far to question “dark matter” the mystery material invented so general relativity math adds up.
Just one, sorry. Multiverse is a stupid concept. This is the only one.