What is Multiverse: Definition and 198 Discussions

The multiverse is a hypothetical group of multiple universes. Together, these universes comprise everything that exists: the entirety of space, time, matter, energy, information, and the physical laws and constants that describe them. The different universes within the multiverse are called "parallel universes", "other universes", "alternate universes", or "many worlds".

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  1. jedishrfu

    Nature of Theory (aka Do Faeries Live in the Multiverse?)

    Great article posted at NPR today on scientific theory: http://www.npr.org/blogs/13.7/2015/03/04/390672748/do-fairies-live-in-the-multiverse
  2. akshaya

    What Lies Between Universes and the Big Bang? Exploring the Multiverse Theory

    Well, the string theory talks about multiverse, unlike the Big Bang theory. Michio Kaku explains it by comparing it with bubbles. There are many universes. These universes are like bubbles floating around, and when they collide, they form a single bubble- a universe. When a single bubble...
  3. T

    Multiverse and Eternal Inflation Disproved?

    Hi. I am a first-year physics undergraduate student, and really want to become a cosmologist eventually. I was looking into how eternal inflation can generate a multiverse and came across this paper on the arXiv: http://arxiv.org/abs/1408.2249 It claims to have shown that eternal inflation...
  4. Garth

    You think there's a multiverse? Get real

    I really appreciated the article in this week's New Scientist You think there's a multiverse? Get real based on Lee Smolin's new book "The Singular Universe and the Reality of Time", which is co-authored with Roberto Mangabeira Unger. Lee has changed his tune from the days of his Cosmological...
  5. Marthinus

    Infinite Universes: Imagining Life Forms & Math Limits

    If there were an infinite number of universes will it be true to say that every conceivable (imagination) life form exists somewhere? Example, somewhere in a universe a 3 headed dragon exists - or does mathematical limit apply in this case?
  6. Priyank

    Exploring the Multiverse: Big Bang & Creation

    People say that Multiverse doesn't exist, But as per #TheGrandDesign by Stephen Hawking, Quantum Fluctuations led to the creation of tiny universes out of nothing. A few of these reached a critical size, then expand in an inflationary manner, formed galaxies, stars and, in at least one case...
  7. Priyank

    A Brief History Of Time (Stephen Hawking) FAQs -- Big Bang & Multiverse question

    If the universe was created by the Big Bang, then how did Multiverse come into existence?
  8. A

    The General Theory of Gravity and Light

    Hello! I am an undergraduate student currently pursuing my Bachelor's before I attain my PhD in Particle Physics. I do however have an exciting concept I would like to have to my name before I disclose it to the world; therefore, I was wondering how this would happen, and if it is possible...
  9. Mandy mae

    Communication between universes

    I will spare all the background, and simply as my question. Does anyone know of any current research being done on communication between universes in relation to multiverse theory? Laugh at you will at the concept. I am currently collecting data and baselines for evaluating occurrences, and...
  10. benlahbib

    The fabric of the cosmos - Universe or Multiverse

    "The Fabric Of The Cosmos," a four-hour series based on the book by renowned physicist and author Brian Greene, takes us to the frontiers of physics to see how scientists are piecing together the most complete picture yet of space, time, and the universe. With each step, audiences will discover...
  11. jnbp13

    What is the Multiverse and How Does it Impact Our Understanding of Physics?

    What do you all have to say about the concept of multiple universe?
  12. B

    What is the evidence for the multiverse?

    The multiverse is a theory that the are countless universes. What is the evidence for the existence of the multiverse?
  13. H

    Proof That Multiverse Doesn't Exist

    If we assume that multiverse exists; it means that scientists goal are to prove this theory...but they are not successful in our universe. That means that there infinite universes where they have succeeded to prove it. Than scientist from one of those infinite universes, should be able to enter...
  14. A

    How many infinite universes can fit within a multiverse?

    In multiverse cosmological models, what sort of infinities are usually used? For instance, in many models is it thought that the multiverse is a continuum - an unlistable (uncountable) infinite set comparable to the real numbers, and that it contains universes of Aleph_0 listable infinities...
  15. J

    Can Our Consciousness Exist in Multiple Parallel Universes Simultaneously?

    I'd like to ask a question to the members of the Quantum Physics board. Reading several articles regarding Quantum Suicide, Copenhagen Interpretation, Paradox, Multiverse theory and Biocentrism has made me wonder.. 1) Is it possible for us to be conscious in two different "Parallel...
  16. E

    Questions about the multiverse theory

    Hi, I'm interested in pre Big Bang theories at the moment and I have been reading about the multiverse theory. My question is, is the multiverse thought to have a beginning? It seems if it didn't it would end the first cause debate. Although, I stumbled across a video of William Lane Craig...
  17. F

    A question about fundamental constants in Multiverse idea

    Has there been a debate as to whether fundamental constants can be chosen freely for a theory or some constraints make it unlikely that to be the case. for example the dimentionful parameters don't have a specific value, only combinations give FSC, that means(to my mind) that there is unlikely...
  18. L

    Multiverse Mail Delivery System

    I was wondering whether it would be possible for the (as of yet fictional) Multiverse Mail Delivery System (MMDS) to find me via some sort of multiverse addressing scheme. In other words, if I worked at the Empire State Building, and someone from another universe wanted to send a letter to my...
  19. E

    Boltzmann's multiverse and fluctuations

    Why is it stated that a fluctuation could occur and spontaneously gather all the molecules of air onto the corner of the room, or that a brain can spontaneously form in empty space if given enough time. Personally I don't agree with this because these events would contradict the laws of...
  20. M

    String Theory and Evidence of the Multiverse

    It seems many people in Science have gravitated towards some form of a multiverse. Whether it's a Cyclical Universe or some version of the Many Worlds Interpretation. The question is where's the evidence? I do think there's some evidence that points to this conclusion. If you look at the work of...
  21. A

    How Many Universes Exist in the Multiverse?

    So i just got started with multiverse. I have a few questions. Do we now know how many other universes are there other than ours? Where is or which one is ours? Like the lowest or the highest or we are at the bottom or at the top in whatever measure that there is?
  22. J

    Traveling to other universes in an infinite multiverse

    I'd just like to preface by saying that I'm not in any way an expert on high-level physics, but I would like to think that after reading a few books and taking a healthy interest in things like cosmology that I have a decent understanding of some concepts, so if you could please bear with me...
  23. J

    Is there a chronology in the multiverse?

    Chronology in the multiverse... One version of the multiverse suggests that our bubble universe came from a progenitor universe and that our universe itself may have spawned progeny universes. Does this not imply a chronology outside of the spacetime continuum of our bubble universe? Please...
  24. W

    Help a lay person understand this theory of the multiverse

    Hi, I don't know any physics, but I wondered if I could get a physicist to indulge me by telling me the most obvious things that are wrong with this theory of the multiverse (please excuse my profound ignorance of your field): Lets say our universe uses three dimensions out of the total...
  25. A

    New Physics Complications Lend Support to Multiverse Hypothesis

    "New Physics Complications Lend Support to Multiverse Hypothesis" From Scientific American: Bolded by me. While certainly not enough to definitively prove the existence of a multiverse, from the way the article reads it does sound like the Standard Model has some holes in it. I...
  26. TheDemx27

    Multiverse Evidence Explanation?

    My friend keeps on harping on this sort of stuff. He says that there is a gravitational pull from other universes affecting the matter in this universe and creating imperfections in the cosmic background radiation. I find it hard to believe that any sort of boson would be able cross the...
  27. J

    Why the Multiverse? Evidence of Many Universes

    According to Leonard Susskind the "finetuning" of the constants of this universe is evidence of many universes with different random constants. The most remarkable of the constants he says is the energy of empty space because of its tiny size (10^113 J/m) and the fact that we couldn't live...
  28. S

    Is Loop Quantum Multiverse a Viable Theory?

    Some time ago I was doing my dissertation on inflation and wrote to Martin Bojowald to ask if loop quantum cosmology was compatible with eternal inflation or not. He said at the time that no work had been done on the subject but it might be something to look at in the future. I have now found...
  29. J

    Probability of stars in a multiverse

    Having recently read two books (Just Six Numbers by Martin Rees and The Fallacy of Fine-Tuning by Victor Stenger) I am confused on one issue. Assuming a multiverse, what is the probability that stars and galaxies would form in a universe. Stenger would say it is high but Rees would say it is...
  30. J

    Does Loop Quantum Cosmology Suggest a New Type of Multiverse?

    End of last year there was a paper "A loop quantum multiverse?" introducing a new paradigm for inhomogeneous loop quantum cosmology that could provide a resolution of the entropy problem of a new expanding universe. "Inhomogeneous space-times in loop quantum cosmology have come under better...
  31. C

    Exploring the Possibility of a Multiverse

    How can there be a concept of it expanding when there is no realm existing for it to expand into? Unless, there is that realm and space is only another new medium our Universe can exist in.
  32. R

    Paradox disproves multiverse, says 9 year old.

    Hello everyone. My nine year old son and I were discussing the concept of the multiverse and he said this to me. "I can disprove the theory of the multiverse" "How?" I said "We'll, if there exists at least one universe for every possibility then there must be a universe where there isn't...
  33. 2

    A couple of questions about Multiverse and Q. Mechanics.

    1) I have read that theory suggests infinite amount of universes and I have also read that the theory suggests a finite amount of universes. Which is the right one? If for every decision new universes are born, the number should be finite, right? 2) In quantum mechanical sense, is it correct...
  34. coktail

    The nature of nothingness/space, and potential multiverse

    Is the current mainstream thinking that spacetime was created with or by the big bang? I've read many posts about a "wrap-around" universe in which there is no border, and traveling to the "edge" of the universe would pop you out on the other side. I've done some brain-wracking, and I haven't...
  35. MathematicalPhysicist

    Is eternal inflation possible in LQC?

    In the multiverse we have multiple universes, in this model does every universe start with a big bang? does this model explain how these big bangs start to occur? Any litertaure on this model that discusses these issues? Thanks in advance.
  36. Ken G

    Is the multiverse cosmology or metaphysics?

    There have been a few threads of late on the multiverse concept in cosmology, and whether it can be viewed as a viable, albeit currently underconstrained cosmological theory that is leading us to demonstrably correct discoveries about our universe, or if it is essentially a fairly arbitrary...
  37. S

    Need Research Question Related to Multiverse (High School Level)

    I am new to this, but in desperate need of help. I'm doing the IB and in our final two years of school we are required to write an essay (extended essay) on one of our chosen subjects. I chose to write an essay on physics and my topic is parallel universes. However, I am really stuck as the...
  38. M

    Understanding the role of infinity into the Multiverse.

    Hi there, I have no mathamatics background or never attended ant classes of Cosmology. So please if you can answer this question please do so without any Math :D please bare with me, English is not my native tongue. This is my question: according to some scientist the (visible)...
  39. F

    Is a Multiverse Considered a Universe or Multiple Universes?

    If we were living in a multiverse, would the right definition be a multiverse? Or would all the universes count as one big universe and not a multiverse? My Astronomy professor said it is impossible for a multiverse to exist because it would be considered an universe.
  40. S

    Exploring the Multiverse: Theories and Visual Models

    Hi first post. I am not a physics major (two basic courses in college) but was watching a mini lecture on the multiverse theory that got me thinking. I've seen a few programs and their very simplified Lehman's explanation of this concept. The only visual model I've seen portrayed was like many...
  41. K

    Does Multiverse theory disprove Freewill?

    So, I have been thinking about this for some time now. If there was other universe with exactly same start and laws as our, It would be exactly the same as ours. Thus there was same people doing same decision as here. Idea freewill is absurd and only things that could explain it would be; Luck...
  42. A

    Proving the multiverse theory through partial differential equations

    Can this be done? If so, how can I go about doing so? This is merely a potential science fair idea for 2013.
  43. A

    Dark energy, matter in a Multiverse Schemata

    Dark Energy is the term used for the energy / quanta that is required to fill our space. If we considered that our space contained multiple universes, we would need between 75 and 85 universes of the same size as our own to fill our space. I think this would be satisfied if our space is a 3-D...
  44. T

    Exploring the Quilted Multiverse: Is There Infinite Matter?

    So, I have been reading Brian Greene's "The Hidden Reality" and in the second chapter he discusses the possibility of a quilted multiverse. The main point of the second chapter is that with a limited amount of particle arrangements and an infinite amount of space means you are going to have...
  45. E

    Multiverse vs Copenhagen, John von Neumann

    According to John von Neumann’s interpretation of QM, consciousness is why the wave function collapses. Copenhagen is on the same general idea, but does not mention it that categorically. Multiverse interpretation of QM says there is no wave function collapse, therefore the observer or...
  46. N

    Big Bang vs Multiverse: Exploring the Debate

    If the big bang occurs at the first moment of time, then how can there be a multiverse?
  47. T

    Is time travel to the past or travel to a multiverse possible?

    And how is it possible or not possible? Can you also take into consideration the new advancements in physics. thanks
  48. D

    Exploring the Quilted Multiverse | Big Bang & Finite Matter

    I have a question regarding the Quilted Multiverse which I am reading about in Brian Greene's latest book The Hidden Reality. As I have no formal education I hope does not make me appear stupid as I am sure there is a logical answer, its just I don't know what it is. When talking about...
  49. B

    How is the many worlds interpretation of QM related to the multiverse theory?

    To my understanding you can believe in the multiverse theory without subscribing to many-worlds interpretation of quantum mechanics. But can you subscribe to the many-worlds interpretation while also believing there is only this one universe (and that it just has hidden dimensions). Can...
  50. I

    Explanation of Multiverse Past in Quantum Mechanics

    Hi- I recently read Brian Greene's Fabric of the Cosmos which led me to think of an interesting concept that I would appreciate further explanation on. On page 456 Greene describes how in the multiverse view, if you traveled back to the past, you would have gone back to a past in a parallel...
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