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Futurama: How plausible is the cyclic model, is it mainstream?

  1. Dec 8, 2016 #1

    it brings to mind as well the many worlds theory

    the cyclic model is shown in a futuruma episode where the professor builds a only forward time machine(consistent with relativity)

    but he goes so far into the future that he ends in the past of the next cycle

    how plausible is this?

    what does mainstream say on this?
  2. jcsd
  3. Dec 8, 2016 #2


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    Based on the current understanding of cosmology, the cyclic model is outdated and goes against the evidence of an ever-expanding universe.
  4. Dec 8, 2016 #3


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    Cyclical models have been popular at least since the 1920's. One of the earliest was advocated by Einstein as an alternative to an expanding universe. Prior to 2011 they were all plagued by issues along the same lines that forbid perpetual motion. Entropy was considered an insurmountable obstacle until dark energy arrived on the cosmology scene. This resurrected some of the old models and served as a basis for some more recent models. All such models still tend to lack a firm basis in theory or empirical support hence struggle to achieve much in the way of mainstream traction.
  5. Dec 8, 2016 #4
    Sean Carroll describes a scenario where billions of years into the future when black holes have coalesced and evaporated, stars have all burnt out and the Universe is at thermal equilibrium and maximum entropy, then there could be quantum fluctuations which decrease entropy. If these fluctuations are great enough, and given infinite time and an infinite Hilbert space, these fluctuations could result in another "big bang" type event.

    The difference between this kind of cycle and the beginning from nothing is really a matter of whether you are more comfortable with a start of something or something which goes on forever.
  6. Dec 9, 2016 #5


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    This idea still suffers a lack of any theoretical basis. The first question would be how does thermal equilibrium manage to re-emerge as physics as we know it? That surely implies an underlying order in the laws of physics we currently fail to grasp.
  7. Dec 9, 2016 #6
    IF the cyclic model was true that would be the eternal recurrence that drove nietche insane

    but myself i would love this model to live my life over and over again as a kid when you love life :)

    the most interesting from it is that as that futurama episode shew it would be posible to time travel to the past wih the aid of relativity time dilation, it would be a question just of technology and brings an interesting solution to einstein grandfather paradox based on oddity or parity

    a guy travels to 2nd aeon past and kills his granfather so he isnt born in 2nd aeon and he is not able to go to third aeon and kill his granda, so he does born in third aeon

    so in the cyclic model the murderer lives in odd aeons and doesnt exist at all in pair aeons
  8. Dec 9, 2016 #7
    Sequences are random but reoccurrences are part of the deal even if it is statistically random. Assuming and lets say that multiverses do exist (3 mathematical model of multiverse w/out experimental support and they also have the extreme versions..). . Independent reoccurrences will appear in the sense that the probability of each BB occurring appears to be independent of what came just before it. Furthermore, each configuration ( lets say 0 through 9) appears to occur essentially one tenth of the time, as would be expected if the universes had been generated uniformly at random assuming we have finite sequences-- 'IF' our universe is a kind of oscillating mechanism.

    According to them. We still don't know. It's hard to say whether everything (in a general sense) could repeat itself given enough oscillations and time.
  9. Dec 9, 2016 #8
    Well since we are in SF here, maybe the stuff which goes in to black holes is the same stuff what comes out of big bangs.
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