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"Big Bang or the Big Bounce?" --New Science Points to a Continuum

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  • derhexer@aol.com
    URL to an interesting post in The daily Galaxy _http://tinyurl.com/7szgbkt_ (http://tinyurl.com/7szgbkt) Actually, I always thought of as the Big Burp after
    Message 1 of 1 , Jul 12, 2012
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      URL to an interesting post in The daily Galaxy
      _http://tinyurl.com/7szgbkt_ (http://tinyurl.com/7szgbkt)

      Actually, I always thought of as the Big Burp after eating too much cold
      pizza and kimchi.

      First few paragraphs
      "The big bang may not have been the beginning of the universe, but merely
      the beginning of one of an infinite series of universes. Two fundamental
      concepts in physics, both of which explain the nature of the Universe in many
      ways, have been difficult to reconcile with each other. European
      researchers have developed a mathematical approach to do so that has the potential to
      explain what came before the Big Bang.
      The big bang singularity --the single point from which the entire universe
      is supposed to have sprung-- is the major sticking point in the big bang
      theory; the calculations just can't account for such a singularity. Without
      evidence associated with the earliest instant of the expansion, the _Big
      Bang theory_ (http://en.wikipedia.org/wiki/Big_Bang) does not provide any
      explanation for such an initial condition.
      According to Einstein’s (classical) _theory of general relativity_
      ity-at-cosmos-scales-.html) , space is a continuum. Regions of space can
      be subdivided into smaller and smaller volumes without end.
      The fundamental idea of quantum mechanics is that physical quantities exist
      in discrete packets (quanta) rather than in a continuum. Further, these
      quanta and the physical phenomena related to them exist on an extremely small
      scale (_Planck scale_ (http://en.wikipedia.org/wiki/Planck_scale) ).
      So far, the theories of quantum mechanics have failed to ‘quantise’
      gravity. Loop quantum gravity (_LQG_
      (http://en.wikipedia.org/wiki/Loop_quantum_gravity) ) is an attempt to do so. It represents space as a net of quantised
      intersecting loops of excited gravitational fields called spin networks.
      This network viewed over time is called spin foam.
      Not only does LQG provide a precise mathematical picture of space and time,
      it enables mathematical solutions to long-standing problems related to
      black holes and the Big Bang. Amazingly, LQG predicts that the Big Bang was
      actually a ‘_Big Bounce_ (http://en.wikipedia.org/wiki/Big_Bounce) ’, not a
      singularity but a continuum, where the collapse of a previous universe
      spawned the creation of ours.
      European researchers initiated the ‘_Effective field theory_
      (http://en.wikipedia.org/wiki/Effective_field_theory) for loop quantum gravity’
      (EFTFORLQG) project to further develop this exciting candidate theory reconciling
      classical and quantum descriptions of the Universe.
      Scientists focused on the _background-independent_
      (http://en.wikipedia.org/wiki/Background_independence) structure of LQG which requires that the
      mathematics defining the system of spacetime be independent of any coordinate
      system or reference frame (background)."


      (I reject your reality and substitute my own)

      [Non-text portions of this message have been removed]
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