John A Wheeler proposed that the universe emerged from a primordial chaos (some sort of pre-geometry or pre-space) from where all physics emerged in the universe.
I thought this could be interesting in the context of multiple universes.
Therefore, has any well renowned physicist considered...
I got a phrase from a book that Stephen Hawking and his daughter Lucy Hawking published in 2011. The book is "George and the Big Bang" which is a science fiction book prepared for children.
I read a phrase on that book that interested me. It was:
"Perhaps there are many universes, each with...
Is there any version of string theory or cosmological inflation that allows the most fundamental laws and constants change between universes?
String Theory and Cosmological Inflation are two theories or models that allow multiple universes to exist. Laws and constants of physics could change...
Michio Kaku and Lawrence Krauss are both well-renowned physicists who propose that the universe (or universes) was generated out of nothing.
Krauss, in his book "A Universe from Nothing" argued that the universe was probably created by a primordial "nothingness" with no space and time and...
Summary: Could different outcomes have different physics in Wigner's friend?
Physicist Eugene Wigner said that consciousness was fundamental for physics and that laws of physics existed because of it. He said that "consciousness can change the usual laws of physics"
He also proposed the...
Summary: Questions about the Multiverse hypothesis and the 'No boundary' conditions approach in cosmology
I have some questions about James Hartle and Stephen Hawking's 'No-boundary' proposal:
- In their approach multiple histories would exist. These histories could yield universes with...
Prominent physicist Paul Dirac proposed a hypothesis that indicated that constants and laws of physics would evolve with time into different constants and laws of nature (https://en.wikipedia.org/wiki/Dirac_large_numbers_hypothesis)
This hypothesis was used by Robert Dicke...
David Deutsch, a theoretical physicist, talks about David Bohm in his book "the Fabric of Reality":
"[w]orking out what Bohm’s invisible wave will do requires the same computations as working out what trillions of shadow photons will do. Some parts of the wave describe us, the observers...
Summary: Does Lawrence Krauss believe in the anthropic principle?
I have read a lot of texts both indicating that physicist Lawrence Krauss is against the anthropic principle. But I have read several texts indicating that Lawrence Krauss believes that this principle is true and has developed...
Physicist John Wheeler wrote an article called "Genesis and Observership" where he said near the end:
"We have reviewed the evidence out of the big bang tat the universe did come into being and the evidence that not only space but all the structures and laws of physics are mutable. In the...
Summary: Could MWI (Many Worlds Interpretation) create universes with fundamentally different physical laws?
Physicist 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...
The anthropic principle is a philosophical consideration that observations of the universe must be compatible with the conscious and sapient life that observes it.
There are two main types of anthropic principle: Weak Anthropic Principle (WAP) and Strong Anthropic Principle (SAP)
The Strong...
My question is about space and the multiverse. I was reading work by Max Tegmark and he sees the multiverse as Level 1-4. A Level 1 multiverse seems like it's self evident and I was wondering about the evidence against it. It's simple:
Space expands faster than we can observe it so we exist in...
I have been interested in Seth Lloyd's cosmological model (which proposes that the universe is a some kind of quantum computer or at least similar to it: https://en.wikipedia.org/wiki/Programming_the_Universe, https://arxiv.org/abs/quant-ph/0501135) since long ago.
I was wondering if his...
I've seen some articles that relate them (like this one: https://arxiv.org/pdf/1407.3118.pdf)
"In this paper we will analyze the third quantization of gravity in path integral formalism. We will use the time-dependent version of WheelerDeWitt equation to analyze the multiverse in this...
Did physicist John Archibald Wheeler propose the existence of multiple universes through his "It from Bit" or "Participatory Universe Principle" or "Law without Law and Pregeometry"? Is the multiverse related to Wheeler's ideas?
I've been told that It can produce multiple universes, obviously...
John's Barrow book "The Constants of Nature" in chapter 13, he talks about a hypothetical multiverse composed of universes governed by other logics. Specifically, he talks about different approaches that physicists take when studying the multiverse, and he mentions a radical approach where even...
Hi Everyone,
One of Hawking's last publications studied the model of universe/multiverse and conjectured that the exit from eternal inflation is "finite and reasonably smooth" - in other words, the inflated boundaries of multiverses could be finite and smooth. Here is the paper link -...
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 universe...
So, basically, multiverse make sense because we can't imagine our universe standing in nothing(or being everything that just expands itself).
If we take this principle, we should have a multi-multiverse, a multi-multi-multiverse and so on. (When the chain ends?).
Is it more evidence to support...
I'm a speculative fiction writer and playwright, a retired archirect with a master of architecture degree in theory, and a theater producer, director, and acting improvisor. I'm currently working on a TV series of 169 episodes exploring life in a contemporary parallel universe very much like...
I found an article written by physicist George Ellis that confused me a little.
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.498.4569&rep=rep1&type=pdf
At some part, he says:
3.2 Non-uniqueness:
Possibilities There is non-uniqueness at both steps. Stating “all that is possible...
I was just curious because if space can expand faster than light, doesn't that mean there will be a lot of space that we just can't see? Do objects just vanish because we can't see them?
For instance, if a hypothetical alien lived in MACS0647-JD galaxy which is 13.3 billion light years away...
Hawking and Hertog's new paper "A Smooth Exit from Eternal Inflation?" does away with the infinite multiverse of Hawking's previous theory and proposes a cosmology that predicts "a simpler and finite universe".
But I can't figure out the extent of this reduction to a "simpler and finite"...
I know this is getting into the highly speculative, but given the mathematics that has been done on versions of these concepts that are not known to be inconsistent:
In the inflation concept which leads to a multiverse of the "bubble universes" type, in which the laws governing the space-time...
Why does max tegmark's and brian greene's levels of multiverses consider as the highest level the mathematical multiverse hypothesis if other authors like David Lewis consider that there could be also universes non described by maths? Why does it stop at level iv (mathematical universes...
In multiverse theory, where it is supposed to describe ALL outcomes, a mathematical multiverse is the ultimate ensemble and there are not more levels than this, but it doesn't contain all the imaginable universes because, as Max Tegmark himseld quoted in a paper "the mathematical universe...
Could huge amounts of energy change the universe's nature (fundamental physical constants, laws, dimension)? Could it change it so much that it would enable our universe to be a multiverse of level 1, 2, 3 or 4?
https://en.wikipedia.org/wiki/Multiverse
I've been looking at one of Max Tegmark's articles about his 'Mathematical Universe' hypothesis, here on arXiv.
As a preliminary, note that Tegmark's framework has four 'levels' of multiverses, with each level being an infinite collection of multiverses at the level below it. The second or...
Forgive my novice question; but, how does one explain the fact that decoherence doesn't contradict the evolution of the wavefunction in every world? Meaning, how is causality preserved in each world and what concept of time is professed wrt. to each world in the MWI? In other words, it seems...